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Maniphest T81254

EEVEE: Scattering pass is also outputted as Transmittance Volume Renderpass
Closed, ResolvedPublicBUG
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Description

System Information
Operating system: Linux-5.4.0-48-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GeForce RTX 3080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 455.23.04

Blender Version
Broken: version: 2.83.*; 2.91.0 Alpha, branch: master, commit date: 2020-09-28 12:56, hash: rBc6b904e97222
Worked: No official release.

Short description of error
When rendering a transmittance volume render pass the result is the same as the scattering pass.

Exact steps for others to reproduce the error

  1. Start Blender
  2. Add an volumetric object + material
  3. Enable the Volumetric render passes.
  4. Look at the differences.

eevee_cycles_volume_transmittance.blend1 MBDownload

Revisions and Commits

rB Blender
D9038rB6b1042f45a58 Fix T81254: Incorrect calculation of EEVEE Transmittance Volumetrics
D9038rB7c373555fd5d Fix T81254: Incorrect calculation of EEVEE Transmittance Volumetrics

Related Objects

Event Timeline

Jeroen Bakker (jbakker) changed the task status from Needs Triage to Confirmed.Sep 28 2020, 4:28 PM
Jeroen Bakker (jbakker) claimed this task.
Jeroen Bakker (jbakker) created this task.
Jeroen Bakker (jbakker) added a project: EEVEE & Viewport.
Jeroen Bakker (jbakker) changed the subtype of this task from "Report" to "Bug".
Jeroen Bakker (jbakker) updated the task description. (Show Details)Sep 28 2020, 4:32 PM
Jeroen Bakker (jbakker) added a revision: D9038: Fix T81254: Incorrect calculation of EEVEE Transmittance Volumetrics.Sep 28 2020, 4:42 PM
Evan Wilson (EAW) added a subscriber: Evan Wilson (EAW).EditedSep 28 2020, 5:45 PM

Oh, I just assumed this was just a current limitation that would be handled in D7010: EEVEE: Arbitrary Output Variables or I would have reported it earlier. My mistake.

Jeroen Bakker (jbakker) added a comment.Sep 28 2020, 7:58 PM

@Evan Wilson (EAW): well it was implemented in 2.83.0 it is also in the demo video of 2.83. But we might have un-fixed it :-)

Jeroen Bakker (jbakker) added a revision: D9048: Eevee: Add Volume Transmittance to Color Render Passes..Sep 29 2020, 1:50 PM
Jeroen Bakker (jbakker) removed a revision: D9048: Eevee: Add Volume Transmittance to Color Render Passes..Sep 29 2020, 1:59 PM
Jeroen Bakker (jbakker) closed this task as Resolved by committing rB7c373555fd5d: Fix T81254: Incorrect calculation of EEVEE Transmittance Volumetrics.Oct 7 2020, 5:27 PM
Jeroen Bakker (jbakker) added a commit: rB7c373555fd5d: Fix T81254: Incorrect calculation of EEVEE Transmittance Volumetrics.
Jeroen Bakker (jbakker) mentioned this in T77348: Blender LTS: Maintenance Task 2.83.Oct 9 2020, 7:02 AM
Jeroen Bakker (jbakker) added a commit: rB6b1042f45a58: Fix T81254: Incorrect calculation of EEVEE Transmittance Volumetrics.Oct 28 2020, 9:59 AM