Rafal123 Posted February 22, 2006 Share Posted February 22, 2006 Can Image Base lighting be used to light i3d stuff? i.e I got a bunch of clouds and wanna use environment sphere with sky as a .hdr file to light the clouds Quote Link to comment Share on other sites More sharing options...
Mario Marengo Posted February 22, 2006 Share Posted February 22, 2006 Can Image Base lighting be used to light i3d stuff?i.e I got a bunch of clouds and wanna use environment sphere with sky as a .hdr file to light the clouds 24965[/snapback] Sure. Off the top of my head, you could scatter points on a hemisphere colored by your hdr image and compute a luminance attribute for each point that you then use to weigh the scattering distribution. You could then use the pointcloud machinery to walk through each point and march toward it as though it were a light -- or simply instance a light shader to each point and forego the pointcloud thing -- and only calc shadows for intensities above a certain threshold. But... By the time it diffuses through the medium (assuming high albedo -- lots of scattering, like a cloud) you'll have almost no definition or directionality left except for the sun source and an ambient-like top fill, so... you're likely better off approximating the skylight contribution in some other way. Quote Link to comment Share on other sites More sharing options...
Rafal123 Posted March 3, 2006 Author Share Posted March 3, 2006 hey Mario, many thanks for answer Quote Link to comment Share on other sites More sharing options...
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