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I want to figure out the diffuse maps of some rusted objects that I plan to render in my game arena. I have taken the images of some sample objects and have also scanned them for a model of the object. I have registered the image with the scanned sample model. For the creation of the diffuse map from here on what would be the best way to proceed, so that I could use the same map under different lighting conditions. I figured out some papers on inverse global illumination, but I wanted to know are there some software that actually implement it or is there a better way to get the diffuse map from these images. Thanks.

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Are you sure you mean to capture a diffuse map (the plain color of the object) and not BRDF (en.wikipedia.org/wiki/…, the way how the surface reflects the light under different conditions)? Getting the diffuse map could be as simple as making a photo under even lighting. –  Roy T. May 4 at 11:53
    
First, I would like to try with diffuse maps. What I mean to say is that is there a way to get the diffuse map from images, an algorithm or some software. I would like to nullify the effect of the lighting already present in the image that I am working with. –  noddy May 5 at 4:28
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