I have been searching around and haven\'t found any really good answer to my question yet..
The thing is that I have this sphere.. just a basic sphere, and I want to flip th
Another way is to simply flip the normals manually by making your object's geometry dynamic.
mesh.geometry.dynamic = true
mesh.geometry.__dirtyVertices = true;
mesh.geometry.__dirtyNormals = true;
mesh.flipSided = true;
//flip every vertex normal in mesh by multiplying normal by -1
for(var i = 0; i