Creating a single texture based on geometry

What I want to do is to create a single hand painted texture for a building. I know that you can do this in 3ds max by unwrapping the geomtry and creating a layout or template that can be exported to photoshop for painting. Once the texture is ready you just wrap your geometry with it.

Is there any way of doing something similar with sketchup?

Search the Extension Warehouse for UV Tools

You can have a look at this tutorial for ideas…