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mitsuba-renderer / mitsuba3

Mitsuba 3: A Retargetable Forward and Inverse Renderer
https://www.mitsuba-renderer.org/
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How to tune the hyperparameters of `prb_projective` #1199

Closed LowRanker closed 5 months ago

LowRanker commented 5 months ago

Hi, there. Our work was build on your previous version mitsuba3.3.0, and we use your prb_reparam but when I update for the latest version, this integrator was not support yet. So I must use your newly excellent work prb_projective integrator to solve for the discontinous visibility effects. But seems like I do not use the correct hyperparameters of this integrator for our scenes, the performance not good as the previous prb_reparam for our scenes, So if I want to use the new version your work. Would you kindly like to tell me how to tune the hyperparameters of prb_projective to handle our scenes. Thanks

ziyi-zhang commented 5 months ago

Hi, could you elaborate a bit on the use case? An example scene would be even better. There are many hyperparams in that integrator. A good test case would be to set the guiding to 'uniform' and use many rounds. This would be almost equivalent to the https://psdr-cuda.readthedocs.io/en/latest/ implementation and is a good entry point to analyze the performance / bias / variance.

LowRanker commented 5 months ago

Thanks for your patient answer. Once the work was published, I will give your the repo link to describe the scenes for help, and now I will try your advice to tune the hyperparameters for our scenes and check what hyperparameters is better for our scenes using this new plugin and try to tune the hyperparameters to solve it accroding to your excellent work and advice.