I am a Blender user, still a student. I work with version 2.78 on MacBookPro Sierra 10.12.6. I follow instructions of Blender Reference Manual, according to which I have to assign material "volume" to the Domain cube, while setting density to 0 (see screenshot 1. I use rendering engine Blender Render. My problem is that when I turn on the Render mode the simulation does not appear (see screenshot2 ). If I try to render the file, same problem. I don't know if this is due to my system, or to my Blender version? Or to a mistake I am making...? Thank you all in advance for your help! Have a nice day. Silvia
After you set the density to zero, you create a texture that uses the voxel data from the smoke sim to adjust the density within the domain based on the smoke simulation.
From the default scene, try Object->Quick Effects->Quick Smoke and you will get a sample material that has a smoke texture setup with the following settings (for Blender Render) -