CyclesProject
ActivePublic

Properties

Description

What is Cycles?
Cycles is a ray tracing renderer focused on interactivity and ease of use, while still supporting many production features.

Contacts

Documentation
Manuals for both Artists and Developers are available.

Development
Cycles is officially under the Blender Foundation umbrella, and so is developed on developer.blender.org. Source code is available either as standalone repository or as bundled into Blender sources.

To clone Cycles together with blender please consult BF Blender project.

To clone Cycles source from stadalone repository as read-only use:

git clone git://git.blender.org/cycles.git

To clone as read-write (needs ssh key):

git clone git@git.blender.org:cycles.git

Browse code
Online browse of sources is available for:

Module Owners: @Brecht Van Lommel (brecht) @Thomas Dinges (dingto) @Sergey Sharybin (sergey)
Developer Members: @Lukas Stockner (lukasstockner97) @Mai Lavelle (maiself) @Dalai Felinto (dfelinto) @Stefan Werner (swerner) @Alexander Gavrilov (angavrilov) @Martijn Berger (juicyfruit) @Nathan Letwory (jesterking)
User Members: @Matt Heimlich (m9105826) @Marco G (marcog)

Recent Activity

Today

Brecht Van Lommel (brecht) reopened T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested as "Open".
Wed, Oct 18, 4:27 AM · Cycles, BF Blender
James W E Bird (3dLuver) added a comment to T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested.

Nope, Still crash to desktop. Latest pull from git but does the same.

Wed, Oct 18, 4:22 AM · Cycles, BF Blender
James W E Bird (3dLuver) added a comment to T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested.

@Brecht Van Lommel (brecht) , Ok mate im pulling from git now and ill do another build to test.

Wed, Oct 18, 3:34 AM · Cycles, BF Blender
Brecht Van Lommel (brecht) added a comment to T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested.

There may be multiple issues here:

Wed, Oct 18, 3:22 AM · Cycles, BF Blender
Brecht Van Lommel (brecht) closed T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested as "Resolved" by committing rB92611dada67f: Fix T53098, T53079: OpenCL world texture errors after recent changes..
Wed, Oct 18, 3:20 AM · Cycles, BF Blender

Yesterday

Brecht Van Lommel (brecht) merged T53072: Unable to use GPU to render any more. "Cuda illegal address in cuCtxSynchronize(), line 1372" into T52572: CUDA Illegal address errors Windows.
Tue, Oct 17, 12:19 PM · Cycles, BF Blender
Brecht Van Lommel (brecht) renamed T52572: CUDA Illegal address errors Windows from "CUDA Error" to "CUDA Illegal address errors Windows".
Tue, Oct 17, 12:19 PM · Cycles, BF Blender
Brecht Van Lommel (brecht) closed T53075: Blender cycles Render with GeForce 1080 as "Resolved".

Great, closing the bug then.

Tue, Oct 17, 12:12 PM · Cycles, BF Blender
knut lagies (knutL) added a comment to T53075: Blender cycles Render with GeForce 1080.

What I did

  1. Run cuda-z on unchanged pc - successful. No problem (strange)
  2. removed all nvidia drivers
  3. Installed all nvidia drivers as fresh installation
  4. Run Blender, changed from blender render to cycles render. Rendered an image>sucessful
Tue, Oct 17, 12:08 PM · Cycles, BF Blender
Sergey Sharybin (sergey) claimed T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested.

Attaching file here:

Tue, Oct 17, 10:50 AM · Cycles, BF Blender
James W E Bird (3dLuver) added a comment to T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested.

Tested 2.8 build bot, Works fine even in viewport. renders fine.

Tue, Oct 17, 1:41 AM · Cycles, BF Blender
LazyDodo (LazyDodo) merged task T53088: Blender lost image source if you select "generated" and then back to "single image" in image texture node. into T52902: change Image.source in Image Texture does not refresh corretly.
Tue, Oct 17, 12:19 AM · Images & Movies, Cycles, BF Blender

Mon, Oct 16

Artturi Mäntysaari (Armmm) created T53088: Blender lost image source if you select "generated" and then back to "single image" in image texture node. .
Mon, Oct 16, 11:34 PM · Images & Movies, Cycles, BF Blender
James W E Bird (3dLuver) added a comment to T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested.

OK, I couldn't send the EXR in the vid as part of payed plugin. Ive downloaded two free HDRI's in EXR and HDRI format and both crash Blender in the same way. In fact every HDR image ive tried now for testing crash's blender with Opencl GPU rendering.

Mon, Oct 16, 6:41 PM · Cycles, BF Blender
Sergey Sharybin (sergey) added a comment to T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested.

Having the video is NOT enough. We need to be able to reproduce the issue, and here we use setups like that a lot and they work. There might be something specific to particular image you're using. Might be resolution, or maybe some encoding problem which is only encountered in Cycles since it's using OIIO and not Blender's ImBuf, could be something with EXIF.. So many possibilitites.

Mon, Oct 16, 5:31 PM · Cycles, BF Blender
James W E Bird (3dLuver) added a comment to T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested.
Mon, Oct 16, 5:10 PM · Cycles, BF Blender
James W E Bird (3dLuver) added a comment to T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested.

Yep Ive downloaded latest build bot, Built my own, and used official 2.79. They all do it.

Mon, Oct 16, 5:08 PM · Cycles, BF Blender
knut lagies (knutL) added a comment to T53075: Blender cycles Render with GeForce 1080.

ok thnx. will do that tomorrow as soon as i have access to that machine.
I will also install and try with cuda-z
I use Touchdesigner heavily on that machine, and that works well. And TD make massive use of the graphics card.

Mon, Oct 16, 1:24 PM · Cycles, BF Blender
Brecht Van Lommel (brecht) added a comment to T53075: Blender cycles Render with GeForce 1080.

That's probably unrelated, this sounds more like T52064, which was a corrupted Nvidia driver installation. This can be verified by checking if another program like CUDA-Z crashes as well. In the latest builds from https://builder.blender.org/download/ we now avoid crashing, but GPU rendering still won't work.

Mon, Oct 16, 1:17 PM · Cycles, BF Blender
Brecht Van Lommel (brecht) added a comment to T52572: CUDA Illegal address errors Windows.

We've now had a couple of similar reports, but currently none of the developers can reproduce this issue. I've tried different scenes, different driver versions, different Windows 10 versions, reinstalling Windows, etc. It all seems stable now, for some reason. It's unclear why there is a problem for some users, while most users seem to have no problem (as evidenced by threads like these).

Mon, Oct 16, 1:11 PM · Cycles, BF Blender
knut lagies (knutL) added a comment to T53075: Blender cycles Render with GeForce 1080.

seems somehow related. problem description identical

Mon, Oct 16, 1:05 PM · Cycles, BF Blender
knut lagies (knutL) added a comment to T53075: Blender cycles Render with GeForce 1080.

ok i will do that. have access to that pc tomorrow.
It happens with a GeForce 1080. I have 2 other PCs with other Nvidia cards and there evrything works fine.

Mon, Oct 16, 12:56 PM · Cycles, BF Blender
Sergey Sharybin (sergey) triaged T53075: Blender cycles Render with GeForce 1080 as "Incomplete" priority.

Just tried on freshly updated Windows 10 (with all updates from October) and same NVidia driver version (did a clean-install using installer from nvidia site) and can not reproduce the issue.

Mon, Oct 16, 12:21 PM · Cycles, BF Blender
Sergey Sharybin (sergey) triaged T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested as "Incomplete" priority.

Does the issue happen with latest builds from builder.blender.org ? If so, please attach file which demonstrates the issue. Also test if this happens on both CPU and GPU.

Mon, Oct 16, 11:11 AM · Cycles, BF Blender
Bastien Montagne (mont29) added a project to T53079: Blender Crash to Desktop Rendering with HDRI (EXR) Maybe others not tested: Cycles.
Mon, Oct 16, 10:00 AM · Cycles, BF Blender
Bastien Montagne (mont29) added a project to T53075: Blender cycles Render with GeForce 1080: Cycles.
Mon, Oct 16, 9:59 AM · Cycles, BF Blender

Fri, Oct 13

LazyDodo (LazyDodo) added a comment to T50522: OpenCL kernel build fails on Linux with Mesa drivers (RX 480).

There's no un-merged patches on our side.

Fri, Oct 13, 10:23 PM · Platform: Linux, Cycles, OpenGL / Gfx, BF Blender
Markus (blenderuser2) added a comment to T50522: OpenCL kernel build fails on Linux with Mesa drivers (RX 480).

Well, that's exactly what I wrote.

Fri, Oct 13, 9:53 PM · Platform: Linux, Cycles, OpenGL / Gfx, BF Blender

Thu, Oct 12

Sergey Sharybin (sergey) added a comment to T50522: OpenCL kernel build fails on Linux with Mesa drivers (RX 480).

The back trace in report indicates crash somewhere inside of Mesa/LLVM. We can not fix that or patch from Blender side, the driver itself is to be brought to a state when it can handle complexity of Cycles kernels.

Thu, Oct 12, 12:13 PM · Platform: Linux, Cycles, OpenGL / Gfx, BF Blender
LazyDodo (LazyDodo) closed T53050: Proposal update normal node for cycles as "Invalid".

Hi, while we love to hear these ideas, this is not the right place for them. This website is mainly used to track bug reports and not feature requests. But luckly, there are some other nice solutions you can take, so please use one of the other forms of communication listed below:

Thu, Oct 12, 4:23 AM · Cycles, BF Blender
carlos (c17vfx) changed Type from Bug to To Do on T53050: Proposal update normal node for cycles.
Thu, Oct 12, 4:22 AM · Cycles, BF Blender
carlos (c17vfx) created T53050: Proposal update normal node for cycles.
Thu, Oct 12, 4:21 AM · Cycles, BF Blender

Wed, Oct 11

Markus (blenderuser2) added a comment to T50522: OpenCL kernel build fails on Linux with Mesa drivers (RX 480).

I understand this is not a Blender issue, however six months after the various bugs were filed, Blender 2.79 still crashes on compilation under Ubuntu 17.10 Beta 2 with LLVM 5.0 and Mesa 17.2.2, even though it appears to me that all reported bugs were fixed.

Wed, Oct 11, 10:22 PM · Platform: Linux, Cycles, OpenGL / Gfx, BF Blender

Tue, Oct 10

Ron Hatfield (radhat) added a comment to T46637: Blender Crashing when switching to Cycles or trying to open the systems tab in the preferences.

I also ran into this. If you're looking for a workaround you might try the following:
Open a blender file done in Cycles. This should give you access to the system tab in user preferences. In the system tab, change the Cycles compute device from None to CUDA and ensure your graphics card is listed and checked. Save the User Settings.

Tue, Oct 10, 11:35 PM · BF Blender, Cycles
Bruno Ortolland (Noss) renamed T53043: Artefacts on render passes Shadow and Diffuse Direct when rendering image texture with zero value in a channel from "Artefacts on render passes Shadow and Diffuse Direct when rendering image texture with zero value in a channel." to "Artefacts on render passes Shadow and Diffuse Direct when rendering image texture with zero value in a channel".
Tue, Oct 10, 3:03 PM · Cycles, BF Blender
Bruno Ortolland (Noss) created T53043: Artefacts on render passes Shadow and Diffuse Direct when rendering image texture with zero value in a channel.
Tue, Oct 10, 3:02 PM · Cycles, BF Blender
Bastien Montagne (mont29) closed T52742: .obj import to cycles crashes the program. as "Archived".

More than a week without reply. Due to the policy of the tracker archiving for until required info/data are provided.

Tue, Oct 10, 9:53 AM · Import/Export, Cycles, Addons

Mon, Oct 9

Brecht Van Lommel (brecht) claimed T53038: Principled shader clearcoat roughness inconsistent change from 0.0177 to 0.0178..
Mon, Oct 9, 9:15 PM · Rendering, Cycles
James Russell (Henrymop) created T53038: Principled shader clearcoat roughness inconsistent change from 0.0177 to 0.0178..
Mon, Oct 9, 8:03 PM · Rendering, Cycles
Dalai Felinto (dfelinto) closed T53014: Cycles material preview no light as "Resolved" by committing rBfdeb125c7a8c: Fix T53014: Cycles material preview not working.
Mon, Oct 9, 4:44 PM · Cycles, BF Blender: 2.8

Sun, Oct 8

Bernd (waebbl) added a comment to T52793: Blender crashes when changing viewport shading to rendered.

Using the 385.69 driver the problem's still there in windows. The output from the console says
CUDA error: Unknown error in cuCtxSynchronize(), line 1835

Sun, Oct 8, 12:58 PM · Cycles, BF Blender

Sat, Oct 7

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

Looks good to me.

Sat, Oct 7, 8:17 PM · Cycles
LazyDodo (LazyDodo) updated the diff for D2019: [Cycles/Cuda/Windows] Enable on demand kernel compilation on windows..

Updated with previous feedback.

Sat, Oct 7, 7:52 PM · Cycles
LazyDodo (LazyDodo) updated the diff for D2019: [Cycles/Cuda/Windows] Enable on demand kernel compilation on windows..

Updated diff to latest master.

Sat, Oct 7, 7:51 PM · Cycles
Dalai Felinto (dfelinto) updated subscribers of T53014: Cycles material preview no light.

Note to self (or @Sergey Sharybin (sergey) if he feels like):
Take a look at render_preview.c::preview_prepare_scene and see if depsgraph is flushing the visibility / disability properly.

Sat, Oct 7, 12:02 AM · Cycles, BF Blender: 2.8

Fri, Oct 6

Dalai Felinto (dfelinto) claimed T53014: Cycles material preview no light.
Fri, Oct 6, 7:25 PM · Cycles, BF Blender: 2.8
Dalai Felinto (dfelinto) created T53014: Cycles material preview no light.
Fri, Oct 6, 7:25 PM · Cycles, BF Blender: 2.8

Thu, Oct 5

Bernd (waebbl) added a comment to T52793: Blender crashes when changing viewport shading to rendered.

@Vuk Sorry I answered by email accidentally.
I didn't notice there's been an update available for windows nvidia driver. I was running it on linux since the report, because it works there. I'll the new driver and then come back.

Thu, Oct 5, 9:06 PM · Cycles, BF Blender
Vuk Gardašević (lijenstina) added a comment to T52793: Blender crashes when changing viewport shading to rendered.

@Bernd (waebbl) Did updating the nVidia drivers solve the issue?

Thu, Oct 5, 2:17 PM · Cycles, BF Blender
marc dion (marcclintdion) added a comment to T43835: strange cracks appear on model.

If behind the scenes, Blender were to move the entire scene using the inverse of the camera transform instead of moving the camera itself, then visible close-up models would never be far from the origin. Now round-off/precision errors would likely be mostly eliminated.
It's a huge job that would take an expert in the field (not me of course! :) It would have to appear to the end-user that nothing has changed so far as UI and navigation are concerned.

Thu, Oct 5, 12:48 PM · Cycles, BF Blender