any way to flip normals on a jit.gl.gridshape?
... on a sphere, for instance, so that the inside of the sphere is the front-facing surface?
play with Cull faces back/front message to the gridshape, - is not really the same thing, but might do what you want.
also, check out bullet line #6 in this:
https://cycling74.com/articles/max-and-opengl-exporting-blender-models/
is how you flip the normals in blender