Hi i´m just a newbie working with blender.
I imported an vrml file from Sprirt to make a 3dwalkthrough. The problem i encounter is that some of the faces show black if i make them sensibel to light. I did find out that i have to flip the faces to fix the Problem. But i do find myself in front of a hell lot of faces to flip. And i´m wondering if i´m doing something wrong in appending my vrml files. Or if there is an easier (faster) way to flip all faces.
MfG Yann
Go into edit mode, select all faces and hit CTRL-N (this flips all faces normals outside). SHIFT-CTRL-N flips them inside.
Hope it helps.
Actually, i tried to rcalc them. What happens is that the ones being ok are now showing black. If i do select them all all of my faces flips around also the on which are ok. And they go black.
MfG Yann
Oh by the way I alsotried to import the file as DXF. It also shows the same Problems.
MfG Yann
Do Ctl+n part by part, like if u import a dragon mesh, do the head first till all look ok, then the wing etc. I’m sure it will work 
Good luck
Ok I tried, didn´t work either semms taht I will have to do it Faces by faces. I would like to add my work so everybody can try but if I compress it it´s still a 20 MB file and i don´t know how to attach files in that chat.
MfG Yann
Have u try one part of the model head etc. 6-15 time ctrl-n cause i have this problem before and it works but i need to do the ctrl-n many time in a part till all normal fix…hmmm :-?
Go into edit mode (TAB), select all vertices (A Key) and do CTRL+N to recalc all faces outside, no matter what direction they’re facing at the moment. It shouldn’t be any harder than that.
Keith. 8)