We're a small studio using Blender for VFX work. I have a large simulation of a building on fire and noticed that the smoke is banding in the upper left corner as seen in the attached picture. The bake alone took 3 days, so I would like to avoid re-baking if possible. Does anyone know if there is a render setting that might fix this?
You can try the Cubic volume interpolation method and Distance sampling. Settings supported on CPU only:
Distance sampling: Best for dense volumes with lights far away.
Cubic: Smoothed high quality interpolation, but slower.
Linear vs Cubic:
GPU support for Cubic interpolation is added in 2.8 version:
Commit 2d92988f6bc4 & f61c340bc15e: CUDA and OpenCL rendering support for cubic interpolation with images and volumes.