First interior animation with Vray RT - looking for some advice

[Deep-Image]

Hi All.

I have been browsing the forums and web to find any helpful information for rendering animations with RT, but it seems to still be a dark art at the moment. We did find the chaos guide to gpu & a great post from Tomasz which I think has lit a little light at the end of the tunnel (http://dabarti.com/vfx/short-guide-t...with-v-ray-rt/).

Just busy prepping our first ever interior animation with Vray RT & I thought that I'd pick everyone's brains before we take the first step out into the unknown

1. Picked up from dabarti's website: Max noise set at 0.025 - 0.03 tends to be suffice for animations, has this been found universal for most scenes (specifically interior animations) or is it just for product / pack shots... We have found that for 4k stills that we are going as low as 0.002 to get clean results so 0.025 sounds like a scary prospect

2. Should we be clamping the max paths/pixel or setting it to 0?

3. Do we need to precalc the light cache as we would have done with adv, and is it also a safe bet to set it to world scale?

4. Precalculated irr map can be now used in RT (3.5), this sounds fun - is this just for stills / animations without moving objects and lights at the moment as I picked up on another thread that the only available option is from file?

5. This is going to be our first shot at using the standalone denoiser. In max I'm guessing we add the denoiser element, set the progressive update frequency to 0 & the preset as custom strength 0.1 & radius 0.01 so that it's not spending time calculating each frame where it's not needed?

Even the slightest bit of help would be appreciated so that we can avoid some sleepless nights

Cheers

*** On another point, I've found that we're spending hours searching sifting through the forums to find info specifically relating to rt GPU. It would be awesome if there was a dedicated forum for the GPU side of things now that it is coming on leaps and bounds! ***

[savage309]

Hey, on the topics:

1. Probably they use some kind of denoising (vdenoise or neat video or something else).
2. In 3.50 we print a warning when max paths per pixel is 0 - it is a bad idea. New default is 10000, but probably something like 2000 or 4000 is safer bet.
3. World scale is a safer bet. Why you had to precalc it for Adv ?
4. Irradiance map was added, because of popular demand .. I would really try the BF/LC approach .
5. You have the option to only generate render elements - http://i.imgur.com/LohEYZV.png.

I will try to put more of the important stuff in the GPU forums here in the near future .

Best,
Blago.

[Deep-Image]

Cheers Blago,

As a rule of thumb we've been sticking at 5000 mp/p, I'll try reducing them in line with your recommendation to see if we can trim the times down.

We'd been pre-calculating the light cache to reduce the chance of flickering in certain circumstances (think we picked this up from the chaos docs?), just been reading another thread & it sounds like blending frames with a denoiser can potentially eliminate flickers anyway which sounds more than promising

I'll take your advice on the bf/lc approach & thanks for the pointing the settings for the denoiser. We've just downloaded the vDenoise maxscript so testing shall soon begin - while I'm here, do you know if the vDenoise maxscript ui defaults to using all available gpu's?

Awesome work on 3.5 by the way! We've seen some really decent savings in terms of required vram & it's great following Tomasz's progress with the new feature set over on the fan group!

Thanks again

[savage309]

Okay, got it.

For vdenoise max script - I am not sure, I just started it and for me the default was CPU. You have to choose "All OpenCL devices".

Thanks for the 3.5 feedback, glad to hear that it is working well for you .

Best,
Blago.