Maniphest T63777

Particle hair - Simple children with UV textures produce black materials, unlike interpolated
Closed, Duplicate
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Assigned To
Brecht Van Lommel (brecht)
Authored By
Serj Maiorov (printerkiller)
Apr 21 2019, 11:19 AM
Tags
  • BF Blender
Subscribers
Philipp Oeser (lichtwerk)
Sebastian Parborg (zeddb)
Serj Maiorov (printerkiller)

Description

System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.96

Blender Version
Broken: version: 2.80 (sub 57), branch: blender2.7, commit date: 2019-04-17 19:26, hash: rBb46245470f79
Worked: (optional)

Short description of error
UV textures work fine when particles children are in Interpolated mode. But when I switch to simple mode (Due to another bug), they turn black.
When I switch to other coordinates like Generated or Object, it actually produces the right colors, but obviously not in the correct places.
Even tried to bypass the problem with baking the textures to vertex colors, and even then it didn't work.
Everything with SSS produces the same bug as well.



Exact steps for others to reproduce the error
Just switch between Interpolated and Simple.

BugReport_001.blend174 MBDownload

Provided a blend file, Apparently, when I try to reproduce the same steps on a simple monkey it works fine.

Related Objects

Event Timeline

Serj Maiorov (printerkiller) created this task.Apr 21 2019, 11:19 AM
Sebastian Parborg (zeddb) assigned this task to Brecht Van Lommel (brecht).Apr 25 2019, 1:43 PM
Sebastian Parborg (zeddb) lowered the priority of this task from 90 to 50.
Sebastian Parborg (zeddb) added a subscriber: Sebastian Parborg (zeddb).

It seems to work fine with eevee so I guessing this might be a cycles issue.

Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).Sep 4 2019, 4:00 PM

@Serj Maiorov (printerkiller) : Good news: one bug is down, see rBee8aad79c159: Fix T56408: Hair children recalc on every frame on Alembic mesh, so you can actually go actually go back to interpolated :)
The other one looks like a duplicate of T60485: Hair particles: 'Use modifier Stack' option with simple children leads to texture disappearing in cycles [interpolated children are fine]

Will merge these reports...

Philipp Oeser (lichtwerk) closed this task as a duplicate of T60485: Hair particles: 'Use modifier Stack' option with simple children leads to texture disappearing in cycles [interpolated children are fine].Sep 4 2019, 4:00 PM