Has anyone figured out a way to fade across a single part ? For example lets say a fade of a material going from non visible to a solid Color across a rectangle - so that it starts at one end and appears to grow ?
That depends on the fade texture parameter that you're using / want.
In this cas I would control with a fade animation the opacity channel. Or you can play with a number animation driving the shift of a fade in the opacity channel of the part material.
Maybe you can post a simple scene representing your scene? So we can help building an example?!
Or post your test result.
Cheers
Marco
https://youtu.be/U9utHBp5RH0