Does Sphere map just need one texture which is generated by taking photo for a reflective sphere positioned at the center of the scene?
If so, the scene behinds the reflective sphere can't be saw in the texture.
Sphere map
I'm bouncing your thread over to the graphics programming forum, as you will probably get a better answer there.
it's correct, it's used for cases when you don't need the scene behind the sphere, e.g. image based lighting.
If so, the scene behinds the reflective sphere can't be saw in the texture.
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