fail to assign material to an object made by boolean union


Now I run into another problem:

I made two cubes and line them beside each other, then I use boolean union function to merge them. Then I move the original two objects to a different layer.

When I try to assign a material to thet resultant union object, only half of it get the material and the other half don’t! What went wrong here and how can I fix it?


The boxes have two materials, so to put one in them.
Select the object, go to edit mode,select all, press F9 and click assign
from the lower left area of screen. Now them should have one
material. hmm maybe


Now the problem is solved.