VRAY GI Settings Help

[fernandoamenedo]

Hi Guys,

 

First of all thanks for the help. This is my first post, till now the forum has been a great help and it is the first time where I am actually going to use it for a personal issue. So for all this time thanks to all that make the forum so useful.

 

I am a bit on a rush here and cannot figure out well what its going on and how to be more efficient. I am very new to Vray so excuse me if I ask things that seem too straight forward.

 

I am trying to render the scene that I post, which came out of a render farm. I have two main isuues. The first one is that seems that my settings are making it take too long (in my computer) and I dont know how to make it so that, without loosing render quality the timing its more efficient. To calculate the light cache and I.map takes about 2hr. for a resolution of 1920x1080.

 

The second issue comes when I send it to the render farm. They seem to ask for the GI settings. Does that mean that I have to render it first in my computer so that later I can upload the saved files for the light cache and the I.m? Also, how much quality would I loose in the GI if I run it in my computer at a considerably lower res?

 

 

note that the render is not what it is supposed to look like, it should have more of the background elements

 

 

Thank you very much for your help!

 

best,

 

Fernando

[fernandoamenedo]

by the way the very light render is one that has no photoshop or render elements post production, so my goal is not to make it look like that at the end. I was posting it to show that with the current lighting that I have other things in the back should also be visible! thanks!

[salvador]

Comparing both renders, it's obvious that your gamma is set to 1.0, confirmed in your settings. Before PS, set your gamma to 2.2 and Reinhard burn value to 0.7 or so, to avoid over-blowing your image; this should fix the exposure. As for the render times, I see nothing special about it, you even have your IR Map preset to Very Low which is not ideal for a render that size, so I think it's in your light / material settings. Check the subdivisions for reflections and glossy effects and the light subdivs as well.

 

It's been said before that if you are new to something (software in this case), you shouldn't compromise to commercial work until you know what you are doing, or else you might be in serious trouble with your client. The forums help and they help a lot, but this is not a school; you might not (will not) understand what's going on behind the advise and the tips until you get yourself some real pro training.

 

The eagerness, the license money and the promise of superb quality fast renders are not enough to actually produce them.

 

Hope it helps.