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Laurent Noel (c2ba)
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User Since
Apr 15 2019, 11:53 AM (26 w, 3 d)

Recent Activity

Today

Laurent Noel (c2ba) added a comment to T68920: Reduce shadow terminator artifacts.

I'm not really sure but I think it might be related to the linear interpolation of the vertex normals on the face, that does not match the true normals a circle would have (correct me if I'm wrong). So each face get a set of interpolated normals that is slightly wrong, and since the interpolated normal is used to build the shading normal with the tangent normal map, correlation artifacts appear.
Try the following: build a cylinder in blender, remove the top and bottom faces, then in edit mode select all faces and subdivide them multiple time. Put your cylinder in smooth shading and you will see the the individual original low res faces appear, even with opengl rendering.
I guess this is because the new vertices created with subdivision have a normal computed from linear interpolation, but I'm not familiar with subdivision algorithms in general and the one used by blender in edit mode so I can only guess. Try to display the normals on edit mode with the overlay, you will see that the normals of the newly created vertices do not create a perfect circular pattern.

Thu, Oct 17, 7:19 PM · Cycles, BF Blender
Laurent Noel (c2ba) updated subscribers of T68920: Reduce shadow terminator artifacts.

Yeah the problem of shadow terminator for normal maps seems to be fixed thanks to https://developer.blender.org/D5399

Thu, Oct 17, 3:10 PM · Cycles, BF Blender

Yesterday

Laurent Noel (c2ba) added a watcher for Infrastructure: Blender Cloud: Laurent Noel (c2ba).
Wed, Oct 16, 3:18 PM

Fri, Oct 11

Laurent Noel (c2ba) added a comment to T68920: Reduce shadow terminator artifacts.

I'd prefer us to first try a better solution, like ignoring backfaces, which may not be all that complicated.
Also as described in T37814#773025, this needs changes in BSDF evaluation too.

Fri, Oct 11, 6:24 PM · Cycles, BF Blender

Thu, Oct 10

Laurent Noel (c2ba) awarded D6039: Add descriptive tooltip for the Build modifier a Love token.
Thu, Oct 10, 2:01 PM

Wed, Oct 2

Laurent Noel (c2ba) added a comment to T68920: Reduce shadow terminator artifacts.

To address this issue, what do you think about adding a "shadow bias" parameter to control an offset from the surface along the geometric normal ? I know its not a perfect solution but at least it would allow users to avoid a lot of rendering artifacts that are due to shadow termination.

Wed, Oct 2, 5:41 PM · Cycles, BF Blender

Wed, Sep 25

Laurent Noel (c2ba) added a reviewer for D5896: Fill ProductVersion of blender executable on Windows: BF Blender.
Wed, Sep 25, 7:05 PM · BF Blender (2.81)
Laurent Noel (c2ba) created D5896: Fill ProductVersion of blender executable on Windows.
Wed, Sep 25, 7:04 PM · BF Blender (2.81)

Sep 4 2019

Laurent Noel (c2ba) added a comment to D4837: Cycles: Add support for adding custom AOV render passes.

I was wondering if the addition of OSL AOVs enables Light Path Expressions in Cycles and if not how complicated would that be to impliment?
LPE's are invaluable in production and used widely in path tracers for a range of custom AOVs and light select passes.

Sep 4 2019, 5:03 PM

May 13 2019

Laurent Noel (c2ba) closed T64391: Adding a "generate" modifier to a curve object leads to a crash as Resolved.

Hi, It seems the issue is solved in the build "version: 2.80 (sub 61), branch: blender2.7, commit date: 2019-05-12 22:25, hash: rB05f1451d7248", thank you for looking at this :)

May 13 2019, 11:25 AM · BF Blender

May 9 2019

Laurent Noel (c2ba) created T64394: "Weight paint" interaction mode provides no feedback on painting.
May 9 2019, 4:40 PM · BF Blender
Laurent Noel (c2ba) updated the task description for T64391: Adding a "generate" modifier to a curve object leads to a crash.
May 9 2019, 4:32 PM · BF Blender
Laurent Noel (c2ba) created T64393: Crash when selecting "UV Editing" or "Texture Paint" workspaces.
May 9 2019, 4:31 PM · BF Blender
Laurent Noel (c2ba) created T64391: Adding a "generate" modifier to a curve object leads to a crash.
May 9 2019, 3:10 PM · BF Blender