Faces on the same dimension - how can I stop them clashing?

[eibbe1]

Hi there
I’m trying to recreate a similar object to the one on the right.
I have created several rectangles, but how can I avoid the problem of the faces trying to show at the same time? I’m trying to make the a background rectangle with other rectangles on top of it / on the surface.
Thanks for any help!

[DaveR]

You need to either get rid of one face or put some space between them. What you’re seeing is your graphics card trying to resolve two faces sharing the same space and it can’t.

[Mark]

Although from this angle, it also kind of looks like nice shading in a hand drawing.