>>2962537sdPBR has a procedural material called "hamon", but it's not autistic enough to also simulate rain hitting the same point. Good luck finding a single viewer who'd care to that extent, though.
>>2962646>>2962691It matters in MikuMikuMoving, in IK chains, and for those > buttons when automatically calculating the local axis and axis limits (which might only work in MikuMikuMoving). Visual guides do help in motion making as well.