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EEVEE alpha blend and volumetrics
Open, Confirmed, MediumPublic


System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.70

Blender Version
Broken: version: 2.81 (sub 3), branch: master, commit date: 2019-08-22 10:21, hash: rBd13952e60378
Worked: (optional)

Short description of error
White appearence on transparent pixels using Volumetrics and Blend Mode set to "Alpha Blend" on materials settings.

Exact steps for others to reproduce the error

[Based on the default startup or an attached .blend file (as simple as possible)]



Event Timeline

Philipp Oeser (lichtwerk) lowered the priority of this task from Needs Triage by Developer to Waiting for Developer to Reproduce.Aug 22 2019, 7:43 PM

No idea how the volume code ties into this, Alpha Blend usually suffers from the sorting problem

@Clément Foucault (fclem), I promised to not ask about Alpha Blend again, but how does this come into play regarding volumetrics [ promise broken :) ]?

Philipp Oeser (lichtwerk) renamed this task from EEVEE alpha channel error usin to EEVEE alpha blend and volumetrics.Aug 22 2019, 7:44 PM
Clément Foucault (fclem) lowered the priority of this task from Waiting for Developer to Reproduce to Confirmed, Medium.Aug 26 2019, 4:47 PM

This is a valid problem. The volumetrics shouldn't add more energy if the alpha is 0.