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Panoramic image as light source.


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I have a nice panoramic image of a landscape wrapped around a hemisphere using cylindrical mapping, then using this geometry as a light source for the light.

The renderings look awesome, but have now doubled in duration when compared to using the Environment Light. The other problem I have is that I don't know how to convert a panoramic image into the cubic mapped format the Houdini prefers.

Can anyone help me with this? cause right now it's take 40mins per frame on a 12core machine compared to 8mins with Environment Light.


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Well if you are using the map just for the diffuse lighting there is no reason why you cannot make a low res blurred version of your panorama with that as the source. Also there is nothing wrong with using a Lat/Long Spherical map at all.


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