WooHoo to small victories! Solved the Program:link error, had a commented out '}'...I think Ive figured out the correct camera postion, in this case camera.aspect is the direction we want. Need to figure out what is going on with the brain textures, see if I cant get that working
adding 4th time dataset to Slices.mm, still needs work. In order to use Texture Slicing, must set MeshBuffer to GL_DYNAMIC_DRAW. To use Raycasting, must set MeshBuffer to GL_STATIC_DRAW