OTOY Forums

Thanks so much for your time, thats really cleared things up. I did try the filter technique before, but didn't set it to 'specular'.

Pete

Placing a filter in front of the light source will make rendering inefficient. You should set the "efficiency" texture of the emission node to some color instead (by default it is a floattexture, but you can set it to a RGBspectrum or a gaussian spectrum instead). Setting the diffuse color of the emitter doesn't have influence on the emitted light.

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Roeland

petenorris wrote:Thanks so much for your time, thats really cleared things up. I did try the filter technique before, but didn't set it to 'specular'.

Pete

you're welcome in fact i learned something new myself, while setting this up: i always thought about textured lights in terms of hdri lighting; but in fact a texture light turns the emitter to a coherent light source - what must be the perfect way to create leds, or a tv screen which illuminates a room...

roeland wrote:Placing a filter in front of the light source will make rendering inefficient. You should set the "efficiency" texture of the emission node to some color instead (by default it is a floattexture, but you can set it to a RGBspectrum or a gaussian spectrum instead). Setting the diffuse color of the emitter doesn't have influence on the emitted light.

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Roeland

by the way, what is the difference between a colored efficiency/texure and a colored texture emission? looks somewhat compareable (while the latter just has not temperature slider)...

Yes, they do the same. In a texture emission it defines the emission color directly, while in a blackbody emission it is multiplied with the blackbody emission spectrum.

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Roeland