Sorry, I haven't explained well my request:

The script have to colour (assign a red-yellow material) to the faces that where created-erased in the comparation from ante and post operam.

The coloured parts (naturally divided by colour) are grouped and moved on their respective layer. This group include the face and his edges.

Thank you for your interest!

This is an example of the work I usually do.
Is it possible to move the new faces (red ones) on a "construction" layer and the same with the old ones (demolition-yellow)?

Hi, I'm an architect that has discovered Sketchup and has find it very good for his work.

My work is especially the construction-demolition project: I have two drawings, one is the ante operam, and the second is the post operam; I have to compare this two drawing, creating a third where the new walls (faces for Sketchup) are colored in red, the demolished are colored in yellow, and the unmodified remain the same.

I'm asking if there is a plugin that can to this work automatically...

Thank you for the interest!

Anthony