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发表于 2007-5-10 10:49:00
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Re:想问问HDR都用到了那些技术?
when implement real HDR, all your lighting calculation is based on HDR info,
which means you color value may greater than 1,use hdr texture,etc..
so you must use float point render target to render you scene.
however,most moniter only support low dynamic range, so ,you have to mapping this hdr scene to low dynamic range.
this require some image-space process, include computing the average luminance for the scene,adjust color value based on this luminance.Besides, hdr offen come with bloom or glow effect so you may also use blur to get these effect.
some hardware don't support multisampling on fp render target,that's why you can't use hdr + aa. |
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