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nicoladanese

fluid with motion blug gets darker

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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

water_blur.png

water_noblur.png

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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.

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hey!

thanks for your suggestions...I'll do some test and get back with some results

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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...

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