Collision Detection fixes?

[SeleneDeVeros]

I rather enjoy building on 3DX, but my goodness if it doesn't feel like pulling teeth sometimes with how the collision detection seems to be handled. I think by now everyone is well aware of the spheres as the worst offenders, generating a disproportionate collider to the physical mesh. The amount of objects that are pretty much unusable for some purposes due to wonky hitboxes is absurd. Just recently I tried to make stepping stones out of the hexagonal blocks, quite a nice shape for it... and completely impossible to use for the purpose because a few pixel-high hexagon is completely unable to be stepped on, might as well be an invisible wall