I took this photograph just a few days ago and thought it would make a nice reference for a cumulonimbus inspiration.
Good capture. Yes, it is inspirational.
It was a massive storm system but it never made it directly overhead but the tall cloud updrafts were nice to see. The internal light scattering is nice to see in the deeper bumps along the shadow side. The white top highlights were almost that bright. What is interesting is the lit side is loaded with very white cauliflower details with a internal darker gradient per each bump of vapor when the sun hits it directly and then there is the shadow side that seems to have somewhat less fine details noticeable.