seeker opened this issue on Jun 10, 2015 ยท 44 posts
bagginsbill posted Thu, 11 June 2015 at 5:18 AM
This is the setup for a fish eye effect. It is a hack, and is relying on the camera being mostly "south" of the lens. (In the positive Z direction, looking along the negative Z axis.) I have to use this hack because there is no node setup that can tell me directly whether the surface is facing towards or away from the camera. (No Edge_Blend doesn't do it. It gives the same answer for straight forward or straight backward.)
If you wanted this to work from other directions, you'd have to adjust the vector represented by the N node's parameter values.
Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)