dipityPix app

Thursday, July 30, 2015

Yet another renderer validation experiment

Now that I have polarization orientation on the iPad right I did another crude experiment.

  
Left: photo, Right:rendering
There is one glaring difference: the reflection at the bottom of the cube the ball is sitting on.   It looks like total internal reflection in the photo and definitely not in the rendering.   Could be uncareful position calibration and could be refractive index error in the input.   Or of course bug in the renderer.   Looks like to go further I will need to do a very careful scene setup, and use a camera that has raw output (sadly the iPhone doesn't as far as I know).

Question: what is the best BRDF model for materials such as glossy paint?  My first impulse is to go use the Disney model, but I bet there is something specific for architectural materials that is used in practice these days?



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