That's not a massive problem. Most games avoid using the same meshes for both rendered graphics and collision detection. Collision detection is usally done aga

That's not a massive problem. Most games avoid using the same meshes for both rendered graphics and collision detection. Collision detection is usally done against a simplified mesh with much fewer polygons. Since most games already already have two meshes, there isn't a problem making one mesh out of quads and the other out of triangles.