In the viewport, smoke looks fine:

Smokey cube in the viewport

However, when I render it with the OpenGL render:

Smokey cube rendered with OpenGL

It looks white because of the background; it's really transparent.

What causes this?


1 Answer 1


I would consider that a bug.

It appears that when the smoke flow object is set to Fire or Fire+Smoke it renders transparent with opengl render.

The fire simulator uses it's own material settings to preview in the 3dview - not the material settings that we configure. It would appear that this preview material works in the 3dview but not the opengl render.

  • $\begingroup$ Reported $\endgroup$
    – gandalf3
    Dec 16, 2013 at 20:06
  • $\begingroup$ For reference this is fixed in source builds after 18 Dec 2013 - will be in release 2.70 $\endgroup$
    – sambler
    Dec 20, 2013 at 9:46

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