How to add thickness to these kind of surfaces

SketchUp Pro
1

Hello!

I need to add thickness of 12 mm to the surfaces from the attached image (from behind)

1
11486×1200 81.3 KB

Its a “origami” like shape. In blender you would use something like a solidify modifer to achieve this but how to do it in sketchup? If i push pull everything intersects with eachother and then its a complete mess.

2

2
21159×970 54.6 KB

Frontal view

3

sketchup pro ? check Fredo6’s Joint pushpull extension on sketchucation. it allows you to do various pushpull actions that will thicken such models.