As the title says, are there any well-known ways to reduce the quite noticible seams between the front and back maps in dual paraboloid environment mapping?
I know I can rotate the projection to try to move where the seam falls to somewhere less critical, but the fact remains that it goes around the whole projection volume like a ring so most of the time there won't even be an orientation where you can completely move the seam out of view.
Shouldn't there be some other way like maybe padding the individual maps or such, or is this just an obvious drawback to the technique as a whole?