AstroChara
commented
11 months ago By the way, Venus and Titan will also have their cloud rotations updated...well Venus' is already correct (90 deg/day resulting in 4 days rotation for the V-shape pattern), but Titan will also be updated, hopefully alongside the texture. For now I've set the rotation to be 180 degrees/day, assuming 100 m/s equatorial rotation speed from Read and Lebonnois (2018). Alternative way to define rotation is through the polar vortex, which rotates as a ~rigid body in ~8 hours.
Currently Earth and Mars' clouds have a CloudSpeed value. This causes the cloud texture to move across the planet over time. Problem is that real life clouds, while animate, are strongly influenced by the topography of Earth - case in point, the Andes Mountains, whose presence produces a unique cloud pattern which is extremely jarring to see floating anywhere else. The same issue also exists on Mars, where the texture shows clouds that form around mountains and in basins.
The motion of clouds, at least on Earth, are probably best represented by flowmaps (not implemented), but not clouds rotating around the entire globe, and in absence of flowmap, I think it is better to simply make clouds stationary so they move along with their parent features.