Allegro Posted September 20, 2010 Share Posted September 20, 2010 On Page 87 of the Advanced Renderman book, there's a section that talks about MakeCubeFaceEnvironment which is described as A cube-face environment map wraps around the origin as a box. It requires six input images, one for each face of the box, identified by their axial direction (positive x, negative x, etc.). Typicaly, renered environment maps will be made in this format, by placing the camera in the center and viewing in each direction. What I'm curious about is that it goes on to state: For better filtering, the images can be wider than the standard 90-degree views so that they overlap slightly. The floating point fov parameter identifies the field of view of the cameras that rendered the images. I haven't heard of using a greater than 90-degree view to generate cube-face environment maps before. Has anyone here given it a shot? Just how "better" is the filtering? How much of an increase over 90 degrees is a good thing? I would have expected an overlap to be a bad thing. Maybe Mantra doesn't handle this the same way as Renderman? Quote Link to comment Share on other sites More sharing options...
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