More than 8 points for a 2D polygon collider

It seems Unity split polygons with more than 8 points even if convex. In a current project I work on, compound shapes causes various incorrect edge collision problems in a context where the only truly elegant and non-hacky solution is a single convex 12-point polygon. I know it's supported by Box2D by changing b2_maxPolyVertices in b2Settings.h, but is there any way to change this in Unity?