Hi, I need the light material, but it is very slow - a rectangle light is much faster? Is it possible to speed up the light material? Thanks, Harry
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I see. I wouldn't say you use it wrong, but I'd suggest approaching it differently.
Currently you count on that emissive value to do the heavy lifting of lighting everything and that costs you extra rendering time.
I'd consider the following few things:- is it going to be a single light source scene - just the emissive mat? If not, introduce a env. of some type, background light, dome with plain color or an IBL setup - even if it's not going to be visible.
- set a appropriate camera exposure, so you don't have to use huge multipliers for that emissive material
- if the material is going to be applied on a disk or plane, can you replace it with an area light
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