Page MenuHome

Mantaflow: Animating smoke color affects existing smoke
Confirmed, NormalPublicBUG

Description

System Information
Operating system: Windows 10
Graphics card: Nvidia GeForce GTX 650 Ti
Processor: Intel® Core™ i7-3770

Blender Version
Broken: (2.83 Alpha, acab7450784a)

Short description of error
In Mantaflow, when animating the smoke color in the emitter settings, the changes seem to also affect the smoke that has already been emitted, instead of only affecting the smoke that will be emitted in the next frame.

Exact steps for others to reproduce the error

  1. Add a mesh.
  2. Press F3, type in and select "Quick Smoke", with the mesh selected.
  3. In the emitter settings, animate the smoke color randomly. Or you could set the flow type to fire or fire + smoke and animate the "Fuel" (previously Flame Rate, if I'm not mistaken.)

.blend featured in the video:

Event Timeline

Richard Antalik (ISS) changed the task status from Needs Triage to Needs Developer to Reproduce.Tue, Mar 17, 2:02 PM

There is report for animating Fuel value already.

I am not sure if animating Smoke Color should not affect existing smoke. @Sebastián Barschkis (sebbas) can you confirm or close this report?

Sebastián Barschkis (sebbas) changed the task status from Needs Developer to Reproduce to Confirmed.Tue, Mar 17, 3:13 PM

Can confirm the issue. Don't think it's necessarily related to the fuel issue mention in T74078.

Let's keep this as a separate report for now.

Richard Antalik (ISS) renamed this task from Mantaflow: Some emitter settings don't animate properly. to Mantaflow: Animating smoke color affects existing smoke.Tue, Mar 17, 4:28 PM
Richard Antalik (ISS) updated the task description. (Show Details)
Jacques Lucke (JacquesLucke) changed the subtype of this task from "Report" to "Bug".Tue, Mar 24, 3:21 PM