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Mantaflow: changing flow type (fire -> fire + smoke) resets Surface Emission
Closed, ResolvedPublicBUG


System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: AMD Radeon R9 200 Series ATI Technologies Inc. 4.5.13587 Core Profile Context 20.2.2 26.20.15019.19000

Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-19 23:28, hash: rB874af5301cdf
Worked: (newest version of Blender that worked as expected)

Short description of error
Changing flow type, the Volume Emission keeps its value but Surface Emsission resets to 1.5 (default)

Exact steps for others to reproduce the error
Add Fluid to the default cube, select flow. Then write 1 into Surface Emission and 1 into Volume Emission. Then change to Fire + Smoke. Volume is unchange, Surface no.

Event Timeline

Germano Cavalcante (mano-wii) changed the task status from Needs Triage to Confirmed.Jun 26 2020, 3:57 PM
Germano Cavalcante (mano-wii) changed the subtype of this task from "Report" to "Bug".

I'm not sure which properties should be reset.
But at first it looks like a bug.

The idea of changing the Surface Emission when changing the flow type was that liquid flows should have a different default value than smoke/fire flows.
The issue you describe should not happen though.

I have made some changes so that the Surface Emission is only changed when changing the flow type from Smoke/Fire+Smoke/Fire to Liquid or, vice-versa, when changing from Liquid to Smoke/Fire+Smoke/Fire.