nicoladanese Posted April 10, 2018 Share Posted April 10, 2018 hey I'm rendering some fluid with mantra, and I noticed that if I turn on motion blur the fluid gets darker, I thought it was an issue with low samples and noise, but even if I crack up the samples the fluid is still very dark compared to the image without motion blur Quote Link to comment Share on other sites More sharing options...
StepbyStepVFX Posted April 10, 2018 Share Posted April 10, 2018 Hi, it seems the problem is more on the edges, and that you have a semi-transparent shader, right ? I would try, although that's just an intuition, to play with the Refraction Quality, the max ray samples, the Stochastic transparency and of course reflect and refract limit (increasing them : I am not sure if when enabling motion blur, you don't increase the number of surface the ray must go through into a tranparent shader...) That's just for testing... let us know if that improves things. Quote Link to comment Share on other sites More sharing options...
nicoladanese Posted April 10, 2018 Author Share Posted April 10, 2018 hey! thanks for your suggestions...I'll do some test and get back with some results Quote Link to comment Share on other sites More sharing options...
nicoladanese Posted April 10, 2018 Author Share Posted April 10, 2018 okay looks like the only thing I had to do was switching from phisically based rendering engine to micropolygon phisically based rendering now with and without motion blur the amount of light is the same, problem is, my render keeps crashing... Quote Link to comment Share on other sites More sharing options...
nicoladanese Posted April 11, 2018 Author Share Posted April 11, 2018 update: cryptomatte was causing the crash... Quote Link to comment Share on other sites More sharing options...
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