Please help with settings

#1

#vray #maya #GI

Hi folks!
Im doing some automotive render focused primary on lighting and rendering, which are my weakest parts. The problem is that while Im finishing the scene and just tweaking render settings a little bit, Im trying to get rid of the noise at the bottom of the tyres (image below). This noise appears on every darker area but for demonstration I just hided the rest of the car and left the tyres visible. If you look at the bottom of the tyres, you can see some grain/noise or somewhat…

My settings are: primary GI irradiance map, secondary GI light cache.
For lighting Im using a skydome with whiteish color and 2 rect lights with 128samples each.

I made a control render along with rawGI pass and according to this Im guessing the problem is in GI…

could anybody help with that ??
Thanks, Adrian

#2

Please, don’t use GD as a catch-all forum. Technique and software specific threads belong in their dedicated forums.
Moving this to Maya/Rendering for you.

#3

A bit small to tell but I’d disable any GI and increase the surface’s reflection subdiv and the hdr/area light subdiv for a start. Once you got that part nice and clean then move on to tweaking GI settings.

#4

Judging by the raw GI pass I’d guess that your anti-aliasing is too low, it really shows on the tread. What are those settings?

Are your lights set to be used by the irradiance cache? If not, I’d say they’re more likely to create noise. You can set them to use the ir cache, but that will make animation flicker a little more. Or turn up the samples; but I’ve never used samples that high.

Keep testing individual things to isolate the noise, it could be in more than one buffer, like reflection too. Turing off GI like Panupat suggested will save time and help isolate it.

#5

Hi, actually your advice brought me to anther idea, I just switched sampler from adapive dmc to adaptive subdivision and noise is gone :slight_smile: So, thanks. I will post filan result here when I finish it

#6

Sooo, I´ve finished it finally… I have to learn more to optimize the render settings, because this one took 8hrs on my Core i5…

here is the editer version in Photoshop and After Effects

and thanks for helping and advices :slight_smile: :wavey:

#7

8hrs!

I’m doing a car animation right now and it’s taking less than 10min. per frame, with motion blur on, at 1024x576. Without the spinning, motion blurred wheels it would be more like 3 minutes. My machine is a 12 core but it still shouldn’t take 50 times longer…

Try these settings! They are tailored for my shots but should still be far faster than 8hrs.

Nice render btw! Personally, I would make the tires a bit glossy.