Hi i am wondering if anyone can tell me how to flip a single primitive, so that its normal is facing the other way ? As i have created a model and all the normals are facing in the oposit direction.

Thanks

Look at the primitive sop->face/hull tab->vertex->reverse.

G

Or just use the Reverse SOP.

Cheers

Well. How would you do this, if you have a very complex model, too tedious to select each flipped manually. And you want to select all visible backfaces?

fake_pilot
Well. How would you do this, if you have a very complex model, too tedious to select each flipped manually. And you want to select all visible backfaces?

I'd use a prim wrangle to do a neighbours lookup. If the dot product of the current prim normal and the avg neighbours normal is too different (let's say, dot < 0), then flip the face. It might need multiple iterations to reverse all backfaces of the model.

This, or try the Polydoctor first. This SOP can repair all kinds of issues.