* brush planes normals snap: +fix of vector-is-close-to-be-ON-axis case, was breaking slivers collisions, drawsurfs * alphamod scale: works now clean shiftBspMain
* brush planes normals snap: +fix of vector-is-close-to-be-ON-axis case, was breaking slivers collisions, drawsurfs * alphamod scale: works now clean shiftBspMain