What is meant by the 'duplicate and invert geometry method'?

:o
written by piraniac in his toon shader demo file.

How would you use that to create the toon look?

Thanks much for any info on this…

I just was thinking it would be fun to have just one little toon. Maybe…

Hello
‘duplicate and invert geometry method’ it’s probably not a shader, but the
old trick to made a dark outline in you character…if I understood well…
Bye

It refers to when you duplicate your mesh, enlarge it (typically using shrink/fatten), then recalculate the normals inside (CTRL+SHIFT+N), then color the copy black. This creates the illusion of a black outline around your model.

Use it with caution though–it also duplicates the polycount of your model!

ahoh… I get it, thanks very much.