Settings?

[Shopper2]

Hi guys,

All the tutorials and manual are great...thanx for all the effort...very helpful.

What i'm still confused about is what is the fastest and what settings to change to speed things up or slow things down.

Is it possible to render a model of (for example) a mobile phone (like a new nokia) at a resolution of 2000 x 2000 px in 20 or so minutes with good quality? also using hdri reflection map and environment map and maybe some studio lights.

what settings define the speed for rendering vs quality using

A:
primary engine: irradiance map
sec engine: light cache

B:
primary engine: QMC
sec engine: light cache

I work in a design studio and often have to print out renderings on A2 at 150 dpi. So sometimes i need large renderings, but cant afford to wait 3 hrs.

kind regards

Justin

[dalomar_cg]

Re: Settings?

If your going to be doing resolutions like 2000x2000 then I would stay away from option B. At that resolution QMC is just going to be far to slow.
Anyway, here would be settings that I would use for a larger res simple studio type render. As a general rule of thumb if you see subdivisions then more subdivisions mean higher quality/longer rendertimes.

Irradiance Map:
Min/Max Rate= -6,-2 (approaching 0 is better, but for for higher res you can shift the numbers down)
HSubdiv= 60-80 (besides the Min/Max rate this is going to be where your main quality setting is going to be)

Light Cache:
Subdiv= 1500-2000 (this is going to be your main quality setting)
Sample Size= .0025 (I usually have this at .005 for regular renders then decrease it for finals)
Scale= Screen
Enable Use For Glossy Rays

As for Image Sampler Settings (Antialiasing) you could go with either Adaptive Subdivision= 0,3 or AdaptiveQMC= 1,6

Try that out and see if that works for you. One last thing, If your using an hdr for GI and background, put a blurred version of the hdr for GI and the sharp one for the background. This will prevent splotches for the sampling of the GI hdr.

[Shopper2]

Re: Settings?

thanks so much for your input...awsome.


also,

what is the best scondary enigine if you have

IR or QMC as the primary?

Is light cache the best

or do you have IR and QMC switched around to whatever you have as the main?

Justin

[dalomar_cg]

Re: Settings?

I almost always use LC for secondary bounces for two main reasons. First off LC calculates many more light bounces than QMC does, and much quicker. Secondly, the option to use for glossy rays speeds things up quite a bit if you have a lot of glossy reflections/refractions. About the only time I don't use LC for secondary bounces is when I'm doing animations and don't feel like setting up a precalc for the LC pass.

[Micha_cg]

Re: Settings?

I use LC allways. Additional I like the advantage to get a full preview within seconds. Don't forget to set the LC num. phases at your core count (dualcore -> 2, quadcore -> 4).