Brecht Van Lommel (brecht)Administrator
Rendering Software Engineer

Projects (16)

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User Since
Jan 3 2003, 6:23 PM (776 w, 5 d)
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Recent Activity

Today

Brecht Van Lommel (brecht) added a comment to T53348: Cycles differences between CPU and GPU in this World nodes.

In the gradient texture we end up doing 1 - sqrt(unit_length_vector) which is supposed to be exactly zero, but of course in practice float precision means it's not. I'll bias it a little bit now to make it exactly zero. We have tweaks like that in other places too, like the checker texture. It helps to make things a bit more robust also when rendering with only the CPU or GPU.

Thu, Nov 23, 4:41 PM · Cycles, BF Blender
Brecht Van Lommel (brecht) added a comment to T53381: Inaccurate results when saving MaterialIDs to OpenEXR and loading them back into Blender.

Half floats can store maximum 65536, but definitely not all integers in between. I think we should always store ID passes with full float precision, regardless if the half float option is used.

Thu, Nov 23, 4:31 PM · Images & Movies, BF Blender
Brecht Van Lommel (brecht) added a comment to D2915: Build Deps/macOS LLVM, OIIO, OSL.

As much as I'd like to simplify things, it seems too early with that percentage.

Thu, Nov 23, 2:12 AM · Platform: Mac OS X
Brecht Van Lommel (brecht) added a comment to D2915: Build Deps/macOS LLVM, OIIO, OSL.

Ok, seems this patch will happen along with an upgrade to VS 2017 then. I'm all for only supporting a single VS version at a time to keep thing simple

Thu, Nov 23, 1:53 AM · Platform: Mac OS X
Brecht Van Lommel (brecht) added a comment to D2922: Optical Vignetting and Depth of Field light distribution.

Thanks for the patch.

Thu, Nov 23, 1:40 AM · Cycles

Yesterday

Brecht Van Lommel (brecht) closed T53373: Blender goes slowly when I have some objets in a scene as Archived.
Wed, Nov 22, 4:55 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to D2915: Build Deps/macOS LLVM, OIIO, OSL.

Why are we still supporting VS 2013?

Wed, Nov 22, 4:53 PM · Platform: Mac OS X
Brecht Van Lommel (brecht) committed rBL61966: Cycles tests: update to test bevel shader + transmission..
Cycles tests: update to test bevel shader + transmission.
Wed, Nov 22, 2:23 AM
Brecht Van Lommel (brecht) triaged T53373: Blender goes slowly when I have some objets in a scene as Incomplete priority.

Suggestions:

  • Install the latest graphics driver from the AMD website. I guess you have an "RX 570", since there is no "570 X" as far as I know.
  • Try using File > Load Factory Settings and then opening the file, to check that there are no specific user preferences causing this.
  • Try using the viewport without Ambient Occlusion (in the 3D viewport Shading panel), or reducing the number Samples since they are quite high in this file.
  • Try disabling Background Images, Texture Solid, and similar settings to figure out if any specific one is causing the issue
  • Try tweaking settings under User Preferences > System (Window Draw Method, Multisample, Region Overlap, ...)
  • Attach the file generated by Help > Save System Info.
Wed, Nov 22, 2:18 AM · BF Blender
Brecht Van Lommel (brecht) updated the task description for T53373: Blender goes slowly when I have some objets in a scene.
Wed, Nov 22, 2:10 AM · BF Blender
Brecht Van Lommel (brecht) committed rBd77f1d65380d: Fix T53313: bevel shader with transmission render artifacts. (authored by Brecht Van Lommel (brecht)).
Fix T53313: bevel shader with transmission render artifacts.
Wed, Nov 22, 1:59 AM
Brecht Van Lommel (brecht) closed T53313: New Bevel shader darkens transparent materials as Resolved by committing rBd77f1d65380d: Fix T53313: bevel shader with transmission render artifacts..
Wed, Nov 22, 1:59 AM · BF Blender
Brecht Van Lommel (brecht) merged T53354: CUDA out of memory into T53364: CUDA out of memory error .
Wed, Nov 22, 12:50 AM · BF Blender
Brecht Van Lommel (brecht) merged task T53354: CUDA out of memory into T53364: CUDA out of memory error .
Wed, Nov 22, 12:50 AM · Cycles, BF Blender
Brecht Van Lommel (brecht) triaged T53324: Black render artifact with CPU+GPU rendering in viewport as Confirmed priority.

Confirmed the artifacts, needs some investigation to figure out if this is a to do or new unknown case.

Wed, Nov 22, 12:43 AM · BF Blender

Mon, Nov 20

Brecht Van Lommel (brecht) committed rB96415cb52a95: Code cleanup: fix harmless compiler warning. (authored by Brecht Van Lommel (brecht)).
Code cleanup: fix harmless compiler warning.
Mon, Nov 20, 11:47 PM
Brecht Van Lommel (brecht) committed rBd089875c4c75: Fix build with OSL 1.9.x, automatically aligns to 16 bytes now. (authored by Brecht Van Lommel (brecht)).
Fix build with OSL 1.9.x, automatically aligns to 16 bytes now.
Mon, Nov 20, 11:47 PM

Sat, Nov 18

Brecht Van Lommel (brecht) added a comment to D2921: Add initial UDIM support to BlenKernel, Image Editor and Cycles.

@marc dion (marcclintdion), it will continue to work with image texture nodes, the same as before. There will be no UDIM specific nodes.

Sat, Nov 18, 9:29 PM

Fri, Nov 17

Brecht Van Lommel (brecht) added a comment to D2921: Add initial UDIM support to BlenKernel, Image Editor and Cycles.

Auto-detection/loading of the sequence sounds like a nice way to go, however I did not see any mention of how multiple images that have the same UDIM-ID will be treated so I thought I'd bring this up to be sure it's on the table with everything else.

Fri, Nov 17, 8:46 PM
Brecht Van Lommel (brecht) requested changes to D2921: Add initial UDIM support to BlenKernel, Image Editor and Cycles.

For the Cycles implementation, I'd prefer to make this part of the regular image node in the kernel, SVM and OSL. In Blender there are separate code paths for multiview, multilayer, movieclip, .. and it just became very hard to understand due to all the code duplication. It's better to treat regular images more like a 1 tile UDIM.

Fri, Nov 17, 5:43 PM
Brecht Van Lommel (brecht) accepted D2920: Cycles: Add render time debug pass.

Looks good to me, agree per pixel is problematic.

Fri, Nov 17, 4:13 PM
Brecht Van Lommel (brecht) accepted D2903: Cycles: Add Scatter Direct and Scatter Indirect passes.

Looks good to commit, just one label needs to change still.

Fri, Nov 17, 4:10 PM

Thu, Nov 16

Brecht Van Lommel (brecht) requested changes to D2916: Cycles: Speed up split kernel builds by splitting svm_eval_nodes out of direct_emission functions.

I don't have any easy solutions for the loop cases.

  • For lamp MIS I would like to see lamps as geometry in the BVH, and basically treat them the same as triangle emission. Mainly we miss a sphere geometry primitive for that.
  • For the shadow catcher we should stop using sample all lights by moving the shadowed/unshadowed division of out the path tracing kernel, and doing it on the final buffers.
  • Branched path tracing may go away eventually if we have better direct light sampling.
  • For transparent shadows not sure what to do. Merging shadow_blocked_transparent_stepped_loop and shadow_blocked_transparent_all_loop may help, but maybe the compiler is already smart enough to not inline the shader evaluation function.
Thu, Nov 16, 6:30 PM
Brecht Van Lommel (brecht) requested changes to D2903: Cycles: Add Scatter Direct and Scatter Indirect passes.

Looks good, just some nitpicky stuff.

Thu, Nov 16, 5:20 PM

Wed, Nov 15

Brecht Van Lommel (brecht) changed the status of T53330: Problema from Archived to Invalid.

Maya, Max, Unreal, Unity, ... use different up axis and handedness convention. Blender works the same as some of them, just not the ones that you are familiar with I guess.

Wed, Nov 15, 8:15 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T53308: Rewrite Notifier System (2.8).

Drivers don't modify the original data with the new depsgraph anymore I guess. Maybe we want to keep showing the modified values in the UI anyway, but that's more a design topic. Regardless, editors like the 3D view or UV editor display not just original data.

Wed, Nov 15, 6:10 PM · BF Blender: 2.8

Tue, Nov 14

Brecht Van Lommel (brecht) closed T53283: Unexpected Fresnel Factor with Principled BSDF as Archived.
Tue, Nov 14, 3:53 PM · Cycles
Brecht Van Lommel (brecht) added a comment to D2872: Add Screen and Overlay blend mode to VSE.

Use BLI_INLINE, it seems more commonly used for this type of thing.

Tue, Nov 14, 3:42 PM · Video Sequencer
Brecht Van Lommel (brecht) closed T53318: Spam removed as Invalid.
Tue, Nov 14, 10:20 AM
Brecht Van Lommel (brecht) renamed T53318: Spam removed from Quicken Support Number to Spam removed.
Tue, Nov 14, 10:20 AM
Brecht Van Lommel (brecht) added a comment to D2915: Build Deps/macOS LLVM, OIIO, OSL.
  • I got release/x64/msvc2015 to link, but any osl render crashed instantly
Tue, Nov 14, 6:17 AM · Platform: Mac OS X
Brecht Van Lommel (brecht) added a comment to T53308: Rewrite Notifier System (2.8).

Drivers can cause a change in one datablock to update a property of any other datablock, and only the depsgraph is aware of this relation. So I think it should be involved? Just the existing depsgraph is not sufficient to replace the notifier system, since it does not cover selection. The depsgraph tagging could include selection changes on datablocks, or the depsgraph could feed into the notifier system and selection changes would feed into it separately.

Tue, Nov 14, 2:28 AM · BF Blender: 2.8

Sun, Nov 12

Brecht Van Lommel (brecht) added a comment to T53265: Alpha channel color output.

It's not the premultiplication that clips it, but the color management view transforms, which works on the unpremultiplied (1/0.25, 0.5/0.25, 0.25/0.25) = (4, 2, 1) values.

Sun, Nov 12, 10:15 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T53265: Alpha channel color output.

There is no post processing on the Combined RGBA colors, it assumes premultiplied RGBA as input and passes those values straight on. In the render you are mixing with a Transparent BSDF, which changes the RGBA values going into the compositor, multiplying the RGB value from emission by 0.25.

Sun, Nov 12, 10:03 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T53199: Blender Suddenly glitches..

See T51521 for more information. You didn't mention which graphics card you have so I'm not sure what the right version is.

Sun, Nov 12, 9:49 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T53283: Unexpected Fresnel Factor with Principled BSDF.

There were some fixes: rBc040ded, rBd85a0a7, rB9e929c9.

Sun, Nov 12, 9:41 PM · Cycles
Brecht Van Lommel (brecht) committed rBebcb88037581: Fix T53273: render bake settings properties not showing correct Python path. (authored by Brecht Van Lommel (brecht)).
Fix T53273: render bake settings properties not showing correct Python path.
Sun, Nov 12, 8:49 PM
Brecht Van Lommel (brecht) committed rBe568c1a9757a: Fix T53289: CUDA missing textures not showing pink, after recent changes. (authored by Brecht Van Lommel (brecht)).
Fix T53289: CUDA missing textures not showing pink, after recent changes.
Sun, Nov 12, 8:49 PM
Brecht Van Lommel (brecht) closed T53289: Missing textures renders as black color (cycles) as Resolved by committing rBe568c1a9757a: Fix T53289: CUDA missing textures not showing pink, after recent changes..
Sun, Nov 12, 8:49 PM · BF Blender
Brecht Van Lommel (brecht) closed T53273: bake settings logged command different from the actual command as Resolved by committing rBebcb88037581: Fix T53273: render bake settings properties not showing correct Python path..
Sun, Nov 12, 8:49 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T53273: bake settings logged command different from the actual command.

Fixing is faster than explaining how to fix it, so I went and ahead and committed.

Sun, Nov 12, 8:49 PM · BF Blender
Brecht Van Lommel (brecht) triaged T53298: Fullscreen is not full and action area of buttons moved as Normal priority.
Sun, Nov 12, 8:25 PM · Platform: Mac OS X, BF Blender
Brecht Van Lommel (brecht) added a comment to T53298: Fullscreen is not full and action area of buttons moved.

I don't have this problem with my Intel Iris card, but also have not upgraded to 10.13 yet, it's likely something broke there.

Sun, Nov 12, 8:25 PM · Platform: Mac OS X, BF Blender
Brecht Van Lommel (brecht) edited Description on Platform: Mac OS X.
Sun, Nov 12, 8:23 PM
Brecht Van Lommel (brecht) closed T53265: Alpha channel color output as Archived.

There's no bug here as far as I can tell, but some more user control would be good. See also the discussion in T52680.

Sun, Nov 12, 8:20 PM · BF Blender
Brecht Van Lommel (brecht) merged T53306: Color mismatch in viewport & final render into T52680: Alpha difference Viewport/F12 .
Sun, Nov 12, 8:01 PM · BF Blender
Brecht Van Lommel (brecht) merged task T53306: Color mismatch in viewport & final render into T52680: Alpha difference Viewport/F12 .
Sun, Nov 12, 8:01 PM · BF Blender
Brecht Van Lommel (brecht) updated the diff for D2913: [cycles] add an nvrtc based cubin cli compiler..

Fix build with nvcc.

Sun, Nov 12, 6:57 PM · Cycles
Brecht Van Lommel (brecht) accepted D2913: [cycles] add an nvrtc based cubin cli compiler..

LD_LIBRARY_PATH is set automatically in CMake now. It's not too bad, just if we do runtime compilation with libnvrtc in the future it's not ideal.

Sun, Nov 12, 6:52 PM · Cycles
Brecht Van Lommel (brecht) updated the diff for D2913: [cycles] add an nvrtc based cubin cli compiler..
  • Fix missing -D flags compared to nvcc
  • Set LD_LIBRARY_PATH to find libnvrtc-builtins on Linux
  • Use vector<> instead of malloc()
  • Remove dependency on cycles_util
  • Code style tweaks
Sun, Nov 12, 6:47 PM · Cycles
Brecht Van Lommel (brecht) added inline comments to D2913: [cycles] add an nvrtc based cubin cli compiler..
Sun, Nov 12, 6:26 PM · Cycles
Brecht Van Lommel (brecht) added inline comments to D2913: [cycles] add an nvrtc based cubin cli compiler..
Sun, Nov 12, 5:56 PM · Cycles
Brecht Van Lommel (brecht) added a comment to D2913: [cycles] add an nvrtc based cubin cli compiler..

Looks generally fine, I'll update the diff with some code style and Linux fixes if you don't mind.

Sun, Nov 12, 3:55 PM · Cycles

Fri, Nov 10

Brecht Van Lommel (brecht) closed T53281: Bevel node should not smooth displacement textures nodes as Archived.

It's a reasonable suggestion, but will not consider it a bug for now. A bump node can be plugged into the bevel node instead.

Fri, Nov 10, 2:03 PM · BF Blender
Brecht Van Lommel (brecht) triaged T53282: keep crashing while rendering in cycles Render as Incomplete priority.

Question:

  • The latest version is Blender 2.79, so please try if it's fixed there.
  • Does this crash also happen when rendering with e.g. 1 sample and 10% resolution? Would make it easier for us to reproduce.
  • The file is missing some images, does the crash also happen without them?
Fri, Nov 10, 1:57 PM · BF Blender
Brecht Van Lommel (brecht) updated the task description for T53282: keep crashing while rendering in cycles Render.
Fri, Nov 10, 1:43 PM · BF Blender
Brecht Van Lommel (brecht) triaged T53283: Unexpected Fresnel Factor with Principled BSDF as Incomplete priority.

Please follow the bug reporting template and provide operating system, Blender version, .blend file, etc.:
https://developer.blender.org/maniphest/task/edit/form/1/

Fri, Nov 10, 1:29 PM · Cycles
Brecht Van Lommel (brecht) added a comment to rBa466d7ae248b: Cycles: better distance sampling for chromatic volume extinction..

The regression test uses a shader setup like the "Practical and Controllable Subsurface Scattering for Production Path Tracing" paper, using a Translucent BSDF to get a diffuse boundary.

Fri, Nov 10, 1:59 AM
Brecht Van Lommel (brecht) committed rBL61962: Cycles tests: add test for chromatic extinction sampling..
Cycles tests: add test for chromatic extinction sampling.
Fri, Nov 10, 1:54 AM
Brecht Van Lommel (brecht) committed rBa466d7ae248b: Cycles: better distance sampling for chromatic volume extinction. (authored by Brecht Van Lommel (brecht)).
Cycles: better distance sampling for chromatic volume extinction.
Fri, Nov 10, 1:53 AM

Thu, Nov 9

Brecht Van Lommel (brecht) committed rB21a535840df1: Fix T53270: crash with multiscatter GGX after recent refactoring. (authored by Brecht Van Lommel (brecht)).
Fix T53270: crash with multiscatter GGX after recent refactoring.
Thu, Nov 9, 8:40 PM
Brecht Van Lommel (brecht) committed rB1ffa01b6f874: Fix (harmless) valgrind warning. (authored by Brecht Van Lommel (brecht)).
Fix (harmless) valgrind warning.
Thu, Nov 9, 8:40 PM
Brecht Van Lommel (brecht) closed T53270: Blender Cycles will crash when preview or render as Resolved by committing rB21a535840df1: Fix T53270: crash with multiscatter GGX after recent refactoring..
Thu, Nov 9, 8:40 PM · Cycles, BF Blender
Brecht Van Lommel (brecht) committed rBbd4bea3e98a4: Cycles: avoid reallocating tile denoising memory many times during render. (authored by Brecht Van Lommel (brecht)).
Cycles: avoid reallocating tile denoising memory many times during render.
Thu, Nov 9, 8:40 PM
Brecht Van Lommel (brecht) requested changes to D2913: [cycles] add an nvrtc based cubin cli compiler..

This is great. It also makes runtime/adaptive compilation for CUDA feasible I guess, if we want to officially support that at some point.

Thu, Nov 9, 1:59 PM · Cycles
Brecht Van Lommel (brecht) added a comment to D2872: Add Screen and Overlay blend mode to VSE.

Did you try BLI_INLINE specifically, which expands to static inline __attribute__((always_inline)) __attribute__((__unused__))?

Thu, Nov 9, 12:55 PM · Video Sequencer
Brecht Van Lommel (brecht) added a comment to D2872: Add Screen and Overlay blend mode to VSE.

If you define the function receiving the function pointer with BLI_INLINE , older compiler version will likely work fine as well.

Thu, Nov 9, 3:07 AM · Video Sequencer

Wed, Nov 8

Brecht Van Lommel (brecht) added a comment to D2803: Cycles: add bevel shader, for raytrace based rounded edges..

Thanks a lot, it's in the release notes now:
https://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.80/Cycles

Wed, Nov 8, 11:32 PM
Brecht Van Lommel (brecht) added a comment to rB28ee0f92184a: Texturing: texture and 3d view draw type changes, these should only have any….

Right, I think the condition should be:

Wed, Nov 8, 10:49 PM
Brecht Van Lommel (brecht) committed rBda4bfb87703e: Merge branch 'master' into blender2.8 (authored by Brecht Van Lommel (brecht)).
Merge branch 'master' into blender2.8
Wed, Nov 8, 1:14 AM
Brecht Van Lommel (brecht) committed rB3f614cda1234: Fix blender player build. (authored by Brecht Van Lommel (brecht)).
Fix blender player build.
Wed, Nov 8, 1:11 AM
Brecht Van Lommel (brecht) committed rB7b1d7074817d: Merge branch 'master' into blender2.8 (authored by Brecht Van Lommel (brecht)).
Merge branch 'master' into blender2.8
Wed, Nov 8, 12:46 AM
Brecht Van Lommel (brecht) committed rBL61960: Cycles tests: add bevel tests, update for multiple light MIS fix..
Cycles tests: add bevel tests, update for multiple light MIS fix.
Wed, Nov 8, 12:46 AM
Brecht Van Lommel (brecht) committed rBa0478ebe379c: Fix incorrect bevel shader in GLSL (should work as if there is no bevel node). (authored by Brecht Van Lommel (brecht)).
Fix incorrect bevel shader in GLSL (should work as if there is no bevel node).
Wed, Nov 8, 12:21 AM
Brecht Van Lommel (brecht) added a comment to D2803: Cycles: add bevel shader, for raytrace based rounded edges..

Committed now.

Wed, Nov 8, 12:04 AM
Brecht Van Lommel (brecht) committed rB2a097527f20d: Fix various issues with (multiview) OpenEXR file save/load. (authored by Brecht Van Lommel (brecht)).
Fix various issues with (multiview) OpenEXR file save/load.
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) committed rB05b08a3b6d86: Fix T53092: errors reading EXR files with different data/display window. (authored by Brecht Van Lommel (brecht)).
Fix T53092: errors reading EXR files with different data/display window.
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) closed D2887: Multiview OpenEXR save/load refactor and fixes..
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) committed rBed7260071bc3: Fix EXR multilayer compositing result saving issues. (authored by Brecht Van Lommel (brecht)).
Fix EXR multilayer compositing result saving issues.
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) closed T53092: Blender 2.79 is freezing while loading EXR Files as Textures. as Resolved by committing rB05b08a3b6d86: Fix T53092: errors reading EXR files with different data/display window..
Wed, Nov 8, 12:03 AM · BF Blender
Brecht Van Lommel (brecht) committed rBe0936e74abc5: Fix image editor showing pass name when there is only a combined pass. (authored by Brecht Van Lommel (brecht)).
Fix image editor showing pass name when there is only a combined pass.
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) committed rB26f39e6359d1: Cycles: add bevel shader, for raytrace based rounded edges. (authored by Brecht Van Lommel (brecht)).
Cycles: add bevel shader, for raytrace based rounded edges.
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) committed rBf79f38673145: Code refactor: rename subsurface to local traversal, for reuse. (authored by Brecht Van Lommel (brecht)).
Code refactor: rename subsurface to local traversal, for reuse.
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) closed D2803: Cycles: add bevel shader, for raytrace based rounded edges..
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) committed rB3dec1de2758a: Fix incorrect color management when saving JPG previews for EXR. (authored by Brecht Van Lommel (brecht)).
Fix incorrect color management when saving JPG previews for EXR.
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) committed rBd0af56fe3b64: Cycles: antialias normal baking if the mesh has a bump map. (authored by Brecht Van Lommel (brecht)).
Cycles: antialias normal baking if the mesh has a bump map.
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) committed rBff34e489117e: Cycles: add an extra CUDA synchronize before rendering. (authored by Brecht Van Lommel (brecht)).
Cycles: add an extra CUDA synchronize before rendering.
Wed, Nov 8, 12:03 AM
Brecht Van Lommel (brecht) committed rBe74b2293422b: Fix incorrect MIS weights in Cycles with multiple lights. (authored by Brecht Van Lommel (brecht)).
Fix incorrect MIS weights in Cycles with multiple lights.
Wed, Nov 8, 12:03 AM

Tue, Nov 7

Brecht Van Lommel (brecht) added a comment to D2019: [Cycles/Cuda/Windows] Enable on demand kernel compilation on windows..

I don't know. Committing this patch or an improved version using the environment variable is fine with me.

Tue, Nov 7, 9:45 PM · Cycles
Brecht Van Lommel (brecht) added a comment to T52924: Talos security advisory for Blender product (TALOS-2017-0451).

Realistically, Blender is not well protected against these kinds of attacks, and the same is true for other CG software. Anyone capable of exploiting these reported vulnerabilities can find 10 more in Blender and its library dependencies. As far as I'm concerned, opening a file with Blender should be considered like opening a file with the Python interpreter, you have the trust to the source it is coming from.

Tue, Nov 7, 8:39 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T52487: Blender unstable when using GPU Compute in any situation.

Closing as duplicate of another bug. It's still a mystery why some users are having this problem, we're trying to figure it out.

Tue, Nov 7, 3:44 AM · Compositing, BF Blender
Brecht Van Lommel (brecht) merged T52487: Blender unstable when using GPU Compute in any situation into T52572: CUDA Illegal address errors Windows.
Tue, Nov 7, 3:44 AM · Cycles, BF Blender
Brecht Van Lommel (brecht) merged task T52487: Blender unstable when using GPU Compute in any situation into T52572: CUDA Illegal address errors Windows.
Tue, Nov 7, 3:44 AM · Compositing, BF Blender
Brecht Van Lommel (brecht) added a comment to T53075: Blender cycles Render with GeForce 1080.

Closing as duplicate of another bug. It's still a mystery why some users are having this problem, we're trying to figure it out.

Tue, Nov 7, 3:43 AM · Cycles, BF Blender
Brecht Van Lommel (brecht) merged T53075: Blender cycles Render with GeForce 1080 into T52572: CUDA Illegal address errors Windows.
Tue, Nov 7, 3:42 AM · Cycles, BF Blender
Brecht Van Lommel (brecht) merged task T53075: Blender cycles Render with GeForce 1080 into T52572: CUDA Illegal address errors Windows.
Tue, Nov 7, 3:42 AM · Cycles, BF Blender
Brecht Van Lommel (brecht) committed rB2440415bd32a: Merge branch 'master' into blender2.8 (authored by Brecht Van Lommel (brecht)).
Merge branch 'master' into blender2.8
Tue, Nov 7, 3:11 AM
Brecht Van Lommel (brecht) committed rB0e3fd70d7ac6: Fix T53129: Cycles missing update when changing image auto refresh. (authored by Brecht Van Lommel (brecht)).
Fix T53129: Cycles missing update when changing image auto refresh.
Tue, Nov 7, 3:11 AM
Brecht Van Lommel (brecht) closed T53129: Image texture node, sequence doesnt preview in viewport as Resolved by committing rB0e3fd70d7ac6: Fix T53129: Cycles missing update when changing image auto refresh..
Tue, Nov 7, 3:11 AM · BF Blender
Brecht Van Lommel (brecht) added a comment to rB535adcdaa3cc: Depsgraph: Iterates over ID Nodes instead of Bases.

This is crashing Cycles in two cases, starting from the default scene:

  • Delete all objects, enable cycles as workspace engine.
  • Add new image in image editor, enable cycles as workspace engine.
Tue, Nov 7, 3:03 AM