Last week I started making a volcano that was starting to erupt. I've got some sparks and I made a nice smoke simulation. I clicked Bake All Dynamics and then rendered. The result was a nice volcano with sparks. The smoke, though... It's hard to explain, but it's vibrating. I don't think smoke should do that. I've google a bit for vibrating smoke, but I couldn't find anything except for actual blender that start smoking. This is the actual animation for anyone who would like to see it. Does anyone here have any idea what I may have done wrong and/or maybe some tips to speed up the baking and rendering process (it take way longer that I have time for).
To speedup rendering, you may render smoke, sparks and volcano separately. Maybe you have accidentally rendered every 2nd frame? do the frames per seconds from the render settings match the video output FPS settings?