by rohandalvi » Thu Jun 17, 2021 3:26 pm
rohandalvi
Thu Jun 17, 2021 3:26 pm
Renderman isn't bad but it's weird to setup and it's slow. A lot slower than Octane because it's CPU only. And the volume shader is weirder than Octane. If you are looking at other renderers you can look into 3delight, it's free up to 12 cores so it's worth a shot. Redshift is worth looking into as well and Arnold. Arnold probably has the best looking shaders.
Planetary atmosphere has to built manually. There's no render engine that does it automatically unless you're using Unreal.
For a falloff from centre outwards, Create a sphere. Use a points from volume. Then create a gradient from the centre out, you can make one using an attribute transfer. Set your point color to black, keep a white object in the centre and transfer the color attribute and set the distance to fade out the color. Copy the color to an attribute called density. The use a node called "volume rasterize attribute" and type density. It will turn your points into a volume and use the density values on the points to set the density of the volume.