DMC Sampler Tutorial

[InTercepto]

Hey guys.

I just finalized writing tutorial about DMC Sampler in VRay. It also covers Adaptive Subdivision sampler and some basic raytracing explanation. I made it for beginners but I suppose it can be useful to advanced users.

Some feedback would be nice, how to improve it. Since this is first revision, it will be updated in future with some new chapters.

http://interstation3d.com/tutorials/...yfing_dmc.html

Thanks.

[sandykoufax]

wow, it looks very useful. thanks.

[jacksc02]

Tutorial looks good.
Might be a bit much for beginners though

[NicoC]

Very clear and useful, thanks a lot for your effort

[Dariusz Makowski (Dadal)]

Cool tutorial ! but 1 thini...teapot times looks wrong

[MoonDoggie]

Thanks for this great info!

[sumario]

adaptive subdivision > "...has a big problem sampling thin objects in the scene" this has been a great problem for me in arch scenes, so I think your tutorial is really good, thanks a lot!!

[InTercepto]

Hey thanks everyone, I'm glad you found it useful. Let me know if you have any ideas how to extend it...

[absolute3d]

Thanks a lot man ! Really useful resource.

Cheers,
Thomas

[Dariusz Makowski (Dadal)]

Hey thanks everyone, I'm glad you found it useful. Let me know if you have any ideas how to extend it...

U can cover AA filters and then Color mapping...and then everything else I guess

[LarsSonparsson]

That was very well made tutorial.
Thank you.

[R2J2]

I much prefer to use dmc noise threshold instead of colour, what your thoughts on that?
it looked like a lot of what you were talking about was based on colour threshold

great tutorial, I like pictures. and turtles.

[InTercepto]

I much prefer to use dmc noise threshold instead of colour, what your thoughts on that?
it looked like a lot of what you were talking about was based on colour threshold

great tutorial, I like pictures. and turtles.

I use color threshold all the time, since the only thing that's influencing DMC image sampler from those Settings>DMC Sampler options is Noise. And, that noise parameter after setting Max DMC to high value becomes irrelevant.
I found it it's better to keep these two options separated because it's easier to tweak scene subdivs values from image sampler setting.

[R2J2]

ah I see, thanks for the input

[olika]

Great Tutorial!
I followed it (had to read a lot of sentences a few times ) and i test your settings on my latest animation job ( flying over a glossy/metal plate wow )
where i have nearly the same settings but always had the feeling that my rendertimes are way to high for simple glossy planes and such things. Before your tutorial i never dared to use material subdivs in the range of 50.

So the real speed boost came from just changing the material subdiv from 16 to 50! Not only speed (and i`m talking from somewhat 4 minutes to 1-2 minutes!, hd frame with just glossy plane and a few glass cylinders flying around)
but also a way cleaner surface on the plane. Min Max 1 / 5 and Clr thr 0.01

So now i don`t really get point why this happens?!
Bring subdivs way up, reduce rendertimes and increase quality with it?!

I guess this is the part with your formula in the tutorial, where material samples gets divided through max samples and so on.
As i said, i can clearly see the benefit in rendertimes and quality but i would like to understand the dependency between this parameters.

Maybe somebody could spot a little bit more light on this? Thanks in advance!

Grüße!