Grant Warwick- Mastering Vray: Material Ideas Needed.

[Raven]

Been using a pretty similar technique, but it just got better.
Just shows after 15 years you can still learn something new everyday.
Thanks for the first tut Grant. Can't wait for more.

[Markus]

Great video Grant !
Keep up the good work. looking forward for the next one

Also here is material i would like to see.
I would like to know how you would do those circular microscratches around highlights on glass like this:
http://i.imgur.com/tvWlwC4h.jpg

You have the same on a carpainter:
http://www.polishd.com.au/images/swirls1.JPG

The thing is... they are always circular around the highlight...regardless how the light moves.

[grantwarwick]

Ahahaha concentric circles...

I'll be perfectly honest...I have never once managed to produce a good enough result to share. Not even close.

When you are dealing with micrscratches, photographed textures never cut it because they are lit non uniformly.

Realistically, to reproduce this, I need to get my mate Aleks to sculpt the scratches into a 20 million poly plane by hand then bake the texture out in an evenly lit setup.

[joconnell]

Grant - your timing for this first video is impeccable.

I was just putting the final touches on a comprehensive V-Ray Optimization Tutorial - drawing on some of the posts which have long been buried in the huge Understand DMC Sampler thread...
Between your video and this tutorial, I think the issue of how to properly optimize V-Ray can finally be put to a rest.

Same - right there with you guys. Lots of homework over christmas for everyone

[grantwarwick]

Same - right there with you guys. Lots of homework over christmas for everyone

AHaha what are you on about man, you don't need to learn shit

[fraggle]

To answer your question though, any and all changes that produce a drastically different image will require adjusting of the AA settings but get over it, it's your job, quit if you don't like it

So there is no correlation, everything is link to the AA only?
Here is an example (NO GI for now) : 1 HDRI as key light + one Vray plane as fill light. 100% Same setting as yours.

[grantwarwick]

Send me the scene.

Not everything is linked to the AA though.
You have introduced completely different lighting...you will need completely different settings.
Just because the Sample rate pass looks correct, doesn't mean the Beauty render will.

You can have perfectly optimised AA settings and completely dog shit subdivision settings. you need to balance BOTH

So what will fix this scene?

Go to the dome light and increase the subdivisions until the Lighting pass is more or less noise free.

[joconnell]

AHaha what are you on about man, you don't need to learn shit

Nope, not homework for me to do! I've been threatening a video for a while and I've the time to get it sorted now. Looking forward to sitting down with your materials too - some cracking results here.

[Dariusz Makowski (Dadal)]

It looks to me like ur Dome lights its night or sunset. Which are the hardests IBL cases to clean up. I suggest 128 Sub D on dome and light. Also use Adaptive subdivision with values 1-2. It should render a lot faster than Adaptive DMC and be quite clean. If its still noisy Id up the IBL subD.

[grantwarwick]

Also use Adaptive subdivision with values 1-2. It should render a lot faster than Adaptive DMC and be quite clean

Another poor soul lost to the misguided documentation.

The Adapative DMC sampler is best in ALL cases when utilised correctly as you have the most control over where you sample the image.

Don't worry, I used to only use adaptive subdivision for years as it was the only way I knew how to get rid of noise.

[Dariusz Makowski (Dadal)]

Well its debatable.

I get smooth light with 12 samples on Adaptive Subdivision where as in DMC I need 128 samples. It also renders a bit longer in DMC. There is nothing else in game here just plain sampels and the way AA look at pixel.

Im just saying. Each scene and set of problems is better solved using either Subdivision or DMC.

[fraggle]

Send me the scene.

Thanks, I will if I failed to take control...

Artists need to take control themselves and not entrust in a "magic" button

Go to the dome light and increase the subdivisions until the Lighting pass is more or less noise free.

light subdivision up to 300 and AA set to 1/2 and rendering time jump to the roof, difuse is noise free, still need to solve the shadow & reflection noise.

[grantwarwick]

Do you mean the min / max value is 1-2?

That is crazy. Remember, the Max value divides the global samples. So having 300 subdivisions isn't the "actual" number. It's relevant to the max AA samples.

[fraggle]

It looks to me like ur Dome lights its night or sunset. Which are the hardests IBL cases to clean up. I suggest 128 Sub D on dome and light. Also use Adaptive subdivision with values 1-2. It should render a lot faster than Adaptive DMC and be quite clean. If its still noisy Id up the IBL subD.

Indeed, it is! I'm wondering if cranking up the intensity multiplier of HDRI will not get it render faster? Sadly, it can't be apply in this scene.
But it seems that lighter is the scene and faster is the render.

[Markus]

Ahahaha concentric circles...

I'll be perfectly honest...I have never once managed to produce a good enough result to share. Not even close.

When you are dealing with micrscratches, photographed textures never cut it because they are lit non uniformly.

Realistically, to reproduce this, I need to get my mate Aleks to sculpt the scratches into a 20 million poly plane by hand then bake the texture out in an evenly lit setup.

I thought you love challenges