vray 3.0 motion blur

[joconnell]

It's all camera rays unfortunately so you're trapped in that sense - what might be handy though is since you're smearing / averaging things quite a bit, you might be able to get away with less material or light samples in some sections.

[DanielWichterich]

thank you. quite a drawback of dmc it seems to me. although it is supposed to be faster when rendering dof and mblur

[joconnell]

Yeah, the random spatial firing rather than structured, dividing method of adaptive subdiv can do better stuff coverage wise alright with much lower memory overheads. Lele has a soft spot for adaptive subdiv though and he's come up with some good ideas on it!

[vlado]

coming back to the original question. is there really no option other than raising the max aa setting? in an animation you are wasting a lot of render time on frames which happen to have not so much motion, right?

No, you are not wasting anything. The moblur subdivs did exactly the same thing as raising the AA samples.

Best regards,
Vlado

[DanielWichterich]

ok, understood. how about a possibility to raise the max aa depending on how much velocity is happening in the rendered frame? does that make sense?
lets say i have a character which is not moving for 50 frames. max aa 4 is totally fine here. but then he is moving really fast and i need to raise it to 20. i would waste time on the first 50 frames when rendering with 20, right?

[tashko.zashev]

Hi Daniel,

The Adaptive DMC sampler will cast more samples in the area that requires to be cleaned more (bigger motion blur), depending on the Noise threshold value.
Here are few examples.




The AA settings for this test are Noise threshold 0.002 Adaptive sampler Min/Max > 2/20.

There will be more control over the object sampling when we are ready with the "AA per object" implementation.