Long Thin Triangles

garrettia

Guys why long thin triangles create shading and baking errors ? Is this related to Overdraw?

Eric Chadwick

No, it's a separate issue. Long thin triangles can create uneven shading because the vertex normals aren't being interpolated very well. Baked normal maps rely heavily on well-formed vertex normals. We have some info here about modeling for baking:

http://wiki.polycount.com/wiki/Normal_Map_Modeling

Long thin triangles are also bad for performance. More info here (if you open the fragmentbuffer article, and then do a search for thin with a space after it, you'll find the info about performance in the third instance of thin .

https://polycount.com/discussion/184216/gpu-performance-for-game-artists

garrettia

Thank you for answers.