Hi people,
seems like vdb is broken more than I thought or even volumes at all.
empty scene, scale in meters, sun size 5 (with default size same thing), default environment and "wdas_cloud_quarter" - step 1m
First of all, even with a 100% scale it does not work as expected
first attachment - 100%, we can see the sun through volume and I checked it with phoenixfd - similar result, so that not only coronavdb problem.
second - 5% scale.
third one - 5% scale, but step 0.2m.
fourth - 5%, step 5m.
Decreasing step size doing things even worse
I tried different absorption, scattering constant/density with different multiplier - all wrong.
So definitely something broken.
Btw it seems like phoenixfd producing correct? results at all scales - but in all cases we can see the sun through cloud.