I have successfully set up my Smoke exactly as I want it, and it previews in the viewport just fine. The smoke is emitted from particles, which themselves are emitted from a vertex group of a mesh.
But when I render it, it simply comes out transparent.
I have 2 Render Layers:
- Smoke only.
- Smoke shadow only (using a shadows only material with ‘Receive Transparent’ etc so I can composite the smoke and its shadow onto a Cycles version of the same scene).
What is extra weird is that is was working fine before, now suddenly isn’t working.
Could it be something to do with caching/baking?
Could it be to do with ticking the particles ‘render emitter’? I want to see smoke but with the emitter masking out its own volume from the smoke so that when you comp it onto the Cycles version the smoke fits snug around the Cycles version of the emitting object.
Funny thing is, i had this problem before, but it suddenly fixed itself without me knowing how or why.