24056 - Massing Exercise (Twisted Surface using profiles on path)

This is a fairly simple exercise, the ideas is to create a surface first, then rotate the profiles.
I have uploaded the Revit file (2025) in case you like to have a play.

[orlandorosjr]

Can you make a tutorial on how to apply the color grey, black and white randomly in position?

[IreneDDShadow]

When I create the form the middle arc disappears. Do you have any ideas why? Thanks