How to avoid the most common blender problem modelling for 3d printing, face normals. 

This video shows you how to overcome a very common problem when modelling with Blender for 3dprinting i.e. forgetting to check that normals are in the right direction. Incorrect normals will probably break your 3d print, booleans and other modifiers. This method allows you to instantly spot incorrect normals.

Хобби