directx - What is the best way to have lights in Direct3D 9 -


the current method use drops fps 30 when having 5 lights. best way have lights in aaa title. have lights everywhere runs smooth. use is

device->lightenable(lightindex,true); device->setlight(lightindex,&light);

many aaa titles using deferred shading lightcomputation. against forward-renderer it's capable of rendering many lights little performance impact (however plain usage drains performance more forward-renderer).

with forward-renderer must iterate on lights in pixelcomputation, limits amount of lights can use, on 1 hand because limited shaderinstructions or shaderconstants on other hand because pixelshaders shouldn't complex.

with deferred shading lighting postprocessed on scene , lights geometry special pixelshader, must rendered consecutively.


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