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Brecht Van Lommel (brecht)Administrator
Rendering Software Engineer

Projects (23)

User Details

User Since
Jan 3 2003, 6:23 PM (846 w, 1 d)
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Administrator

Recent Activity

Yesterday

Brecht Van Lommel (brecht) closed T62867: dynatopo does not work with anchor, drag, drag dot stroke types as Archived.

Dynamic topology is intentionally disabled for these options in the code. It might be good to improve the code to support cases, but it's not considered a bug.

Sat, Mar 23, 1:23 PM · BF Blender
Brecht Van Lommel (brecht) updated SPAMMER (madhusree).
Sat, Mar 23, 1:13 PM
Brecht Van Lommel (brecht) added a comment to T62871: Move rotate scale not working while in draw mode. .

@Antonio Vazquez (antoniov): shift + numpad 4/6 view roll is like rotating the canvas I think.

Sat, Mar 23, 12:56 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T62871: Move rotate scale not working while in draw mode. .

Just close as Archived if you don't think it's a bug.

Sat, Mar 23, 11:23 AM · BF Blender
Brecht Van Lommel (brecht) added a comment to T58938: Crash when using EEVEE and Intel HD 4000.

It's crashing somewhere in the drawing of the background, but it's hard to say why from the backtrace and difficult to try to fix remotely. It may be something in the specific OpenGL state or shader and not the way the crashing function is called.

Sat, Mar 23, 11:22 AM · BF Blender
Brecht Van Lommel (brecht) added a comment to D4498: Only brushes with pinned materials have materials..

@matc (matc) does not have commit rights.

Sat, Mar 23, 11:15 AM

Fri, Mar 22

Philipp Oeser (lichtwerk) awarded rB8b4e0eb88e71: Fix T59962, T60130: error adding image sequence with node wrangler. a Party Time token.
Fri, Mar 22, 9:34 PM
AV (Dspazio) awarded rBac643aa8815e: Fix COLLADA build after recent changes. a Like token.
Fri, Mar 22, 8:38 PM
Brecht Van Lommel (brecht) removed 2 auditor(s) for rBda5b6ed75bf0: Modifiers: add minimum number of vertices to triangulate modifier.: William Reynish (billreynish), Gavin Scott (Zoot).

Fixed in rBac643aa8815e: Fix COLLADA build after recent changes..

Fri, Mar 22, 8:38 PM
Brecht Van Lommel (brecht) committed rB967364dc3eb7: Cleanup: fix compiler warning. (authored by Brecht Van Lommel (brecht)).
Cleanup: fix compiler warning.
Fri, Mar 22, 8:37 PM
Brecht Van Lommel (brecht) committed rBac643aa8815e: Fix COLLADA build after recent changes. (authored by Brecht Van Lommel (brecht)).
Fix COLLADA build after recent changes.
Fri, Mar 22, 8:37 PM
Brecht Van Lommel (brecht) added a comment to D4514: Fix T53997: [bug] island_margin in bpy.ops.uv.smart_project seems to have no effect.

Looking at this closer, I think your original patch is actually the right one to user here. Sorry for that.

Fri, Mar 22, 7:09 PM
Brecht Van Lommel (brecht) abandoned D4540: Node Wrangler: error adding image sequence node / multiple images.

Underlying bug in Blender fixed in rB8b4e0eb88e71: Fix T59962, T60130: error adding image sequence with node wrangler., I'd rather not add workarounds for that kind of thing.

Fri, Mar 22, 7:01 PM
Brecht Van Lommel (brecht) committed rB8b4e0eb88e71: Fix T59962, T60130: error adding image sequence with node wrangler. (authored by Brecht Van Lommel (brecht)).
Fix T59962, T60130: error adding image sequence with node wrangler.
Fri, Mar 22, 7:01 PM
Brecht Van Lommel (brecht) closed T59962: Node Wrangler puts out an error when adding image sequence node as Resolved by committing rB8b4e0eb88e71: Fix T59962, T60130: error adding image sequence with node wrangler..
Fri, Mar 22, 7:01 PM · Nodes, Addons
Brecht Van Lommel (brecht) closed T60130: NodeWrangler: cannot load image sequence in compositor (jpeg & exr) as Resolved by committing rB8b4e0eb88e71: Fix T59962, T60130: error adding image sequence with node wrangler..
Fri, Mar 22, 7:01 PM · Addons, BF Blender
Brecht Van Lommel (brecht) requested changes to D4567: Fix T62815: wrong camera outline when shift_x is changed.

The result looks wrong to me:

Fri, Mar 22, 6:31 PM
Brecht Van Lommel (brecht) accepted D4568: Add copy/paste of any IDs in Outliner..

Looks to me, but please also commit the tooltips change because a description like "buffer (temp .blend file)" is not at all relevant to users.

Fri, Mar 22, 6:23 PM
Brecht Van Lommel (brecht) committed rB9e3e92a908df: Revert "Cleanup: remove legacy mesh save support" (authored by Brecht Van Lommel (brecht)).
Revert "Cleanup: remove legacy mesh save support"
Fri, Mar 22, 6:20 PM
Brecht Van Lommel (brecht) committed rB9c5c91cc7cc8: Merge branch 'blender2.7' (authored by Brecht Van Lommel (brecht)).
Merge branch 'blender2.7'
Fri, Mar 22, 6:20 PM
Brecht Van Lommel (brecht) changed the status of T62793: Legacy Mesh Format in 2.79 from Archived to Resolved by committing rB9e3e92a908df: Revert "Cleanup: remove legacy mesh save support".
Fri, Mar 22, 6:20 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T62793: Legacy Mesh Format in 2.79.

I've restored it in the 2.79 branch now, but it stays removed in master / 2.8.

Fri, Mar 22, 6:20 PM · BF Blender
Brecht Van Lommel (brecht) committed rBda5b6ed75bf0: Modifiers: add minimum number of vertices to triangulate modifier. (authored by Ish Bosamiya (ish_bosamiya)).
Modifiers: add minimum number of vertices to triangulate modifier.
Fri, Mar 22, 6:14 PM
Brecht Van Lommel (brecht) closed D4367: Triangulate modifier add side limit.
Fri, Mar 22, 6:14 PM · Modifiers, BF Blender
Brecht Van Lommel (brecht) committed rBc89dcc89e6eb: UI: move stereo panel above output. (authored by Brecht Van Lommel (brecht)).
UI: move stereo panel above output.
Fri, Mar 22, 6:14 PM
Brecht Van Lommel (brecht) merged T62848: Not Normal (no pun intended) interface into T61551: macOS 10.11 and NVIDIA user interface display broken.
Fri, Mar 22, 5:43 PM · Platform: macOS, OpenGL / Gfx, BF Blender
Brecht Van Lommel (brecht) merged task T62848: Not Normal (no pun intended) interface into T61551: macOS 10.11 and NVIDIA user interface display broken.
Fri, Mar 22, 5:43 PM · Addons
Brecht Van Lommel (brecht) committed rB8e6f7659646a: Fix T62844: Cycles crash with bevel and degenerate geometry. (authored by Brecht Van Lommel (brecht)).
Fix T62844: Cycles crash with bevel and degenerate geometry.
Fri, Mar 22, 5:31 PM
Brecht Van Lommel (brecht) closed T62844: Blender forcibly exits when rendering images using CPU+GPU. as Resolved by committing rB8e6f7659646a: Fix T62844: Cycles crash with bevel and degenerate geometry..
Fri, Mar 22, 5:30 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T37953: Separate sun lamp size as angular diameter.

@Tim Stullich (tstullich), search for SUN in source/blender/draw/engines/eevee.

Fri, Mar 22, 5:28 PM · Quick Hacks, Cycles, BF Blender, Rendering
Brecht Van Lommel (brecht) added a comment to T53211: RFC: Clang-format for Blender.

TabExpand will be removed once the clang migration is done, so not worth optimizing.

Fri, Mar 22, 4:52 PM · BF Blender
Brecht Van Lommel (brecht) triaged T62846: Viewport glitching in Blender 2.80 after opening a 2.79b .blend file as Needs Information from User priority.

Clip End in the 3D view sidebar is set to inf, that's not a valid value. Was that set intentionally? It can only work for Cycles to use a very high clip end without artifacts, and even then it should be a regular number instead of inf.

Fri, Mar 22, 4:50 PM · BF Blender
Brecht Van Lommel (brecht) accepted D4528: Fix T62348: Cycles - Viewport rendering not update on switching viewlayer.
Fri, Mar 22, 4:36 PM
Brecht Van Lommel (brecht) accepted D4564: NodeEditor: Connect Viewer To Socket Selection.
Fri, Mar 22, 4:34 PM
Brecht Van Lommel (brecht) raised the priority of T60651: Blender automatically shut down when adding new workspaces. from Normal to Confirmed, Medium.

Yes, we should fix such crashes.

Fri, Mar 22, 4:32 PM · BF Blender
Brecht Van Lommel (brecht) accepted D4556: Fix T49979: HSV/HSL 'Far' interpolation in colorbands when both stops have same hue..
Fri, Mar 22, 4:32 PM
Brecht Van Lommel (brecht) updated the task description for T62844: Blender forcibly exits when rendering images using CPU+GPU..
Fri, Mar 22, 4:18 PM · BF Blender
Brecht Van Lommel (brecht) claimed T62844: Blender forcibly exits when rendering images using CPU+GPU..
Fri, Mar 22, 4:18 PM · BF Blender
Brecht Van Lommel (brecht) claimed T62829: floating windows on Cycles and Region Overlap.

The mention is fine, it's just linking to the commit that matches your build.

Fri, Mar 22, 4:06 PM · User Interface, BF Blender: 2.8, Cycles, BF Blender
Brecht Van Lommel (brecht) closed T62604: Blender 2.80.48 Video Editing Adding Scenes that are selected in the outliner bug/behavior? as Resolved by committing rBM4595: Fix T62604: update docs regarding scene strips using same scene..
Fri, Mar 22, 3:52 PM · Documentation, BF Blender, Video Sequencer
Brecht Van Lommel (brecht) committed rBM4595: Fix T62604: update docs regarding scene strips using same scene..
Fix T62604: update docs regarding scene strips using same scene.
Fri, Mar 22, 3:52 PM
Brecht Van Lommel (brecht) added a comment to T53211: RFC: Clang-format for Blender.

@LazyDodo (LazyDodo), committed your fixes and batching to improve performance. Did not test performance on Windows yet, on Linux here time went from 10s to 6s.

Fri, Mar 22, 3:38 PM · BF Blender
Brecht Van Lommel (brecht) committed rB6366dec69fff: Clang-format: make format fixes and performance improvements for Windows. (authored by Brecht Van Lommel (brecht)).
Clang-format: make format fixes and performance improvements for Windows.
Fri, Mar 22, 3:37 PM
Brecht Van Lommel (brecht) requested changes to D4528: Fix T62348: Cycles - Viewport rendering not update on switching viewlayer.
Fri, Mar 22, 3:32 PM
Brecht Van Lommel (brecht) assigned T62841: Blender 2.8. Turn off 4,5,6,... collections visability hotkeys when you inside edit mode. Often press wrong [nearby] key ["4"] to Dalai Felinto (dfelinto).

This was changed for T55921: Toggling visibility for collections doesn't work in Pose mode, but should only apply to object and pose mode and I think.

Fri, Mar 22, 3:21 PM · BF Blender
Brecht Van Lommel (brecht) closed T62843: Problem with the Favorites feature, working alongside the Pie-menu add-on as Archived.

You can go into the preferences of this add-on, and disable the pie menu that overrides the Q key.

Fri, Mar 22, 3:19 PM · BF Blender
Brecht Van Lommel (brecht) committed rBb0c40de5ee9a: Fix/workaround some types of black dots in denoising with bright speculars. (authored by Brecht Van Lommel (brecht)).
Fix/workaround some types of black dots in denoising with bright speculars.
Fri, Mar 22, 2:27 PM
Brecht Van Lommel (brecht) added a reviewer for D4574: Include blosc, embree and opencollada into BUILD_NOTES.txt file.: Bastien Montagne (mont29).
Fri, Mar 22, 2:02 PM
Brecht Van Lommel (brecht) added a comment to T62838: Grease Pencil Material Color Change Freeze.

Ok, then it's a general issue with Eevee rendering for which we have a report open.

Fri, Mar 22, 1:50 PM · BF Blender
Brecht Van Lommel (brecht) merged T62838: Grease Pencil Material Color Change Freeze into T58938: Crash when using EEVEE and Intel HD 4000.
Fri, Mar 22, 1:50 PM · BF Blender
Brecht Van Lommel (brecht) merged task T62838: Grease Pencil Material Color Change Freeze into T58938: Crash when using EEVEE and Intel HD 4000.
Fri, Mar 22, 1:50 PM · BF Blender
Brecht Van Lommel (brecht) lowered the priority of T58436: Bug in the preview - "Shading" mode menu. - Hackintosh (OSX system) from Normal to Needs Information from User.
Fri, Mar 22, 12:54 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T58436: Bug in the preview - "Shading" mode menu. - Hackintosh (OSX system).

Is this still an issue in the latest builds?

Fri, Mar 22, 12:54 PM · BF Blender
Brecht Van Lommel (brecht) lowered the priority of T57364: Environment Textures cause strange glitches on reflective surfaces - Blender 2.8 - Eevee - Mac OSX from Confirmed, Medium to Needs Information from User.

Is this still an issue in the latest builds?

Fri, Mar 22, 12:53 PM · Platform: macOS, Eevee, BF Blender
Brecht Van Lommel (brecht) closed T62830: idk why blender is crushing? (2.79b) as Resolved.
Fri, Mar 22, 12:28 PM · BF Blender
Brecht Van Lommel (brecht) triaged T62838: Grease Pencil Material Color Change Freeze as Needs Information from User priority.

Does setting the 3D viewport to Rendered display mode crash?
Does editing materials work for you outside of 2D animation, or does that crash as well?

Fri, Mar 22, 12:24 PM · BF Blender
Brecht Van Lommel (brecht) raised the priority of T62820: Wrong OBJ Import from Needs Information from User to Needs Triage by Developer.
Fri, Mar 22, 12:19 PM · BF Blender
Brecht Van Lommel (brecht) reopened T62820: Wrong OBJ Import as "Open".
Fri, Mar 22, 12:19 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T58938: Crash when using EEVEE and Intel HD 4000.

@LazyDodo (LazyDodo), maybe installing the older driver again will let you repro the crash again?

Fri, Mar 22, 12:18 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T62833: Commandline Rendering keeps synchronizing and doesn't start rendering.

You can send me the file privately (to my username @blender.org), however we still expect users to try to isolate the problem.

Fri, Mar 22, 12:15 PM · BF Blender
Brecht Van Lommel (brecht) accepted rB7ed5e9f2f78f: UI: Make Shutter Speed properties consistent in Eevee & Cycles..

Fixed in rBc2584c1fad51: Fix incorrect hard limits on motion blur shutter time..

Fri, Mar 22, 12:14 PM
Brecht Van Lommel (brecht) committed rBc2584c1fad51: Fix incorrect hard limits on motion blur shutter time. (authored by Brecht Van Lommel (brecht)).
Fix incorrect hard limits on motion blur shutter time.
Fri, Mar 22, 12:11 PM
Brecht Van Lommel (brecht) triaged T60462: Blender 2.8 (various versions) crashes in GPU animation rendering (many card types), both eevee and cycles as Needs Information from User priority.

We still need to have one example .blend to reproduce the problem.

Fri, Mar 22, 12:04 PM · Cycles, Eevee, BF Blender
Brecht Van Lommel (brecht) closed T56185: Changing color of material of grease pencil crashes blender 2.8 as Resolved.

@Dont Want (McLP), please create a new bug report for your case.

Fri, Mar 22, 12:01 PM · BF Blender, Grease Pencil
Brecht Van Lommel (brecht) added a comment to rB7ed5e9f2f78f: UI: Make Shutter Speed properties consistent in Eevee & Cycles..

RNA_def_property_range imposes a hard limit.

Fri, Mar 22, 11:46 AM
Brecht Van Lommel (brecht) raised a concern with rB7ed5e9f2f78f: UI: Make Shutter Speed properties consistent in Eevee & Cycles..

Shutter speed should be 0.0 or higher, there should be no other hard minimum or maximum on it.

Fri, Mar 22, 11:45 AM
Brecht Van Lommel (brecht) merged T62832: Eevee separate window light (or bump/normals?) mess up into T61870: Eevee Shading Error- Object's go completely black if they have a normal map..
Fri, Mar 22, 11:38 AM · Eevee, BF Blender
Brecht Van Lommel (brecht) merged task T62832: Eevee separate window light (or bump/normals?) mess up into T61870: Eevee Shading Error- Object's go completely black if they have a normal map..
Fri, Mar 22, 11:38 AM · Eevee, BF Blender
Brecht Van Lommel (brecht) closed T62834: blender2.8XR as Archived.

Thanks for the suggestion, but this website is not for these kinds of feature requests:
https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests

Fri, Mar 22, 10:53 AM · Addons
Brecht Van Lommel (brecht) triaged T62833: Commandline Rendering keeps synchronizing and doesn't start rendering as Needs Information from User priority.

We need a .blend file to investigate the issue, it's unclear what in this scene might be causing issues.

Fri, Mar 22, 10:51 AM · BF Blender
Brecht Van Lommel (brecht) triaged T62824: Blender se cierra en cycles render as Needs Information from User priority.
Fri, Mar 22, 8:56 AM · BF Blender
Brecht Van Lommel (brecht) closed T62831: bpy.context.scene.collection.children -- hide_viewport property -- not working from script as Archived.

The API could be improved here and we are rethinking the visibility controls in general, but no bug here.

Fri, Mar 22, 8:51 AM · BF Blender
Brecht Van Lommel (brecht) triaged T62830: idk why blender is crushing? (2.79b) as Needs Information from User priority.

Please see if the problem is fixed in the latest 2.79 build:
https://builder.blender.org/download/

Fri, Mar 22, 8:48 AM · BF Blender

Thu, Mar 21

Brecht Van Lommel (brecht) added a comment to T62824: Blender se cierra en cycles render.

Please try the latest 2.79 build from:
https://builder.blender.org/download/

Thu, Mar 21, 11:17 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T62823: Blender se cierra en cycles render.

@Alexander (Metz), it seems you reported this bug twice, please see T62824: Blender se cierra en cycles render.

Thu, Mar 21, 11:16 PM · BF Blender
Brecht Van Lommel (brecht) merged T62823: Blender se cierra en cycles render into T62824: Blender se cierra en cycles render.
Thu, Mar 21, 11:15 PM · BF Blender
Brecht Van Lommel (brecht) merged task T62823: Blender se cierra en cycles render into T62824: Blender se cierra en cycles render.
Thu, Mar 21, 11:15 PM · BF Blender
Brecht Van Lommel (brecht) changed the status of T60928: Box select does not select more than one object from Invalid to Archived.
Thu, Mar 21, 10:55 PM · BF Blender
zgorg (zgorg) awarded T60928: Box select does not select more than one object a Pirate Logo token.
Thu, Mar 21, 9:56 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T58938: Crash when using EEVEE and Intel HD 4000.

@Johnson Smith (vignette), try installing the latest drivers (15.33.47.5059), your version (10.18.10.5059) is quite old.
https://downloadcenter.intel.com/product/81499/Intel-HD-Graphics-4000

Thu, Mar 21, 8:59 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T60283: Clang-format migration: Investigate branch migration plan & document it.

I've added a script to rebase and merge master into branches: rBDTa64a4237d820: Add script to merge clang-format changes into branches.
https://wiki.blender.org/wiki/Tools/ClangFormat#Migrating_Branches_and_Patches

Thu, Mar 21, 7:29 PM · BF Blender
Brecht Van Lommel (brecht) committed rBDTa64a4237d820: Add script to merge clang-format changes into branches. (authored by Brecht Van Lommel (brecht)).
Add script to merge clang-format changes into branches.
Thu, Mar 21, 7:27 PM
Brecht Van Lommel (brecht) added a comment to T53211: RFC: Clang-format for Blender.

I do indeed prefer Align personally.

Thu, Mar 21, 6:23 PM · BF Blender
Brecht Van Lommel (brecht) committed rB26bbe63fb0a5: Clang-format: make format is now multithreaded. (authored by Brecht Van Lommel (brecht)).
Clang-format: make format is now multithreaded.
Thu, Mar 21, 6:18 PM
Brecht Van Lommel (brecht) closed T62818: | SNAPPING | doesen't work as it worked as Archived.

Snapping for rotation and scale is disabled by default now, you can enable it in the snapping menu in the 3D viewport.

Thu, Mar 21, 6:00 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T62793: Legacy Mesh Format in 2.79.

Then I think the plugin that you are using to open the scene in 3ds max needs to be updated, 2.63 was released 7 years ago, we can't keep supporting that forever.

Thu, Mar 21, 4:24 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to D4568: Add copy/paste of any IDs in Outliner..

I think the main confusing thing with this will be if you paste e.g. a material, it's not obvious where it ends up. Objects appear in the viewport but for other datablocks it's not clear.

Thu, Mar 21, 4:02 PM
Brecht Van Lommel (brecht) added a comment to T62786: Under or No Utilization of AMD Asus Vega RX 64 GPU and Double Listing.

clinfo shows the same GPU twice, so I think there is something wrong with your AMD driver installation. Maybe there are remnants from an older driver install, or a bug in the AMD driver.

Thu, Mar 21, 12:58 PM · BF Blender
Brecht Van Lommel (brecht) added a comment to T60277: Clang-format migration: Wiki documentation on how to run clang-format and when to do so.

Started docs here:
https://wiki.blender.org/wiki/Tools/ClangFormat

Thu, Mar 21, 12:45 PM · BF Blender
Brecht Van Lommel (brecht) reassigned T62798: TEXTURE PAINT | MASK- display color from Brecht Van Lommel (brecht) to Jeroen Bakker (jbakker).
Thu, Mar 21, 11:58 AM · BF Blender
Brecht Van Lommel (brecht) raised the priority of T59014: Black 3D viewport with Intel HD and Windows 8.1 from Normal to Confirmed, High.

We haven't been able to reproduce this ourselves as developers, but marking as high priority due to the number of reports.

Thu, Mar 21, 11:56 AM · BF Blender
Brecht Van Lommel (brecht) merged T62796: weird error with blender 2.8 into T59014: Black 3D viewport with Intel HD and Windows 8.1.
Thu, Mar 21, 11:52 AM · BF Blender
Brecht Van Lommel (brecht) merged task T62796: weird error with blender 2.8 into T59014: Black 3D viewport with Intel HD and Windows 8.1.
Thu, Mar 21, 11:52 AM · BF Blender
Brecht Van Lommel (brecht) added a comment to T62796: weird error with blender 2.8.

Updating drivers may help, meanwhile this is also a duplicate report.

Thu, Mar 21, 11:52 AM · BF Blender
Brecht Van Lommel (brecht) assigned T62810: Workbench Anti-Aliasing behavior inverted to Jeroen Bakker (jbakker).
Thu, Mar 21, 11:11 AM · BF Blender
Brecht Van Lommel (brecht) closed T62811: Blender 2.80.51: Pen pointer snap-to sensitivity option as Archived.

Thanks for the suggestion, but we do not handle them on this website:
https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests

Thu, Mar 21, 11:10 AM · User Interface, BF Blender: 2.8
Brecht Van Lommel (brecht) triaged T62786: Under or No Utilization of AMD Asus Vega RX 64 GPU and Double Listing as Needs Information from User priority.

When rendering with CPU only, the tiles sizes might be too big for all cores to be used. That's something we want to improve still, so you don't have to tweak tile size for best performance, but it's outside the scope of the bug tracker.

Thu, Mar 21, 12:07 AM · BF Blender

Wed, Mar 20

Brecht Van Lommel (brecht) removed a project from T62794: Principled BSDF base color alpha value is not reflected in viewport with alpha blend: BF Blender: 2.8.
Wed, Mar 20, 11:39 PM · BF Blender
Brecht Van Lommel (brecht) renamed T62794: Principled BSDF base color alpha value is not reflected in viewport with alpha blend from `Principled BSDF` shader `Base Color` `Alpha` value is not reflected in viewport with `Alpha Blend` to Principled BSDF base color alpha value is not reflected in viewport with alpha blend.
Wed, Mar 20, 11:38 PM · BF Blender
Brecht Van Lommel (brecht) triaged T62794: Principled BSDF base color alpha value is not reflected in viewport with alpha blend as Confirmed, Low priority.

Color sockets in Cycles and Eevee do not actually have an alpha value, this is a leftover from old Blender Internal code. This needs to be cleaned up in the UI still. For transparency you should mix with the Transparent BSDF.

Wed, Mar 20, 11:38 PM · BF Blender