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Maniphest T96563

GPU subdivision: 3.0.1 - 3.1.0 EEVEE Tangent Space Discrepancy
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Description

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 511.79

Blender Version
Broken: version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: rBc77597cd0e15

Short description of error
There is a discrepancy when tangents are calculated when using GPU subdivision.

Exact steps for others to reproduce the error
View the the test file with EEVEE. Compare GPU subdivision on vs. off.

Test File:

vector_displacement_tangent.blend114 KBDownload

Revisions and Commits

rB Blender
rBf84f9eb8ed43 Fix T96563: tangents artifacts with GPU subdivision

Event Timeline

Ethan Hall (Ethan1080) created this task.Mar 17 2022, 3:41 PM
Ethan Hall (Ethan1080) updated the task description. (Show Details)Mar 17 2022, 4:06 PM
Ethan Hall (Ethan1080) added a project: EEVEE & Viewport.
Richard Antalik (ISS) changed the task status from Needs Triage to Confirmed.Mar 18 2022, 1:09 AM
Philipp Oeser (lichtwerk) added subscribers: Kévin Dietrich (kevindietrich), Philipp Oeser (lichtwerk).Apr 12 2022, 4:37 PM

CC @Kévin Dietrich (kevindietrich)

Philipp Oeser (lichtwerk) renamed this task from 3.0.1 - 3.1.0 EEVEE GPU Subdivision Tangent Space Discrepancy to GPU subdivision: 3.0.1 - 3.1.0 EEVEE Tangent Space Discrepancy.Apr 12 2022, 4:44 PM
Philipp Oeser (lichtwerk) triaged this task as High priority.Apr 13 2022, 11:14 AM

Talked to @Kévin Dietrich (kevindietrich) , setting to High prio (since it is a bug in a new feature according to the playbook

Kévin Dietrich (kevindietrich) closed this task as Resolved by committing rBf84f9eb8ed43: Fix T96563: tangents artifacts with GPU subdivision.Apr 14 2022, 3:50 AM
Kévin Dietrich (kevindietrich) claimed this task.
Kévin Dietrich (kevindietrich) added a commit: rBf84f9eb8ed43: Fix T96563: tangents artifacts with GPU subdivision.