Fryrender/maxwell and VRAY!

[mdi]

Hi all,

this weekend I took a few moments out to play with the new fryrender demo, the quality is very high (im quite impressed), but as you all know its far to slow...far to slow for me anyway, tight deadlines and fryrenders just not going to happen for me.

the point of me trying it out was more about how to get more realistic renders out of vray, and understanding how phisicaly correct lighting works and how to translate all that info to vray. bellow are a few questions that maybe somone can offer some advice on, im pretty sure I know all the answers to all this, but im not 100% sure.



So......fryrender renders at 2.2 gamma and WB of 6500k, and all the lights (though it uses textures as lights) are set using Watts.

So....im guessing that to set vray up to the same settings i would need to...

Use a vray camera with a custom WB.....but vray uses a colour as its WB, how does 6500k translate to a colour?

Lights...Watts....I tend to use vraylights for alot of my work...whats the best way to translate what fryrender does to what vray does...watts/colour of light (in fryrender) to multiplier default units and colour (vray)...should I even be using default units???

Also, im guessing that 1st and 2nd GI bounces in vray are phisicaly correct...and are equal to those in fryrender?



cheers for any advice

[RErender]

There used to be a site that had a kelvin to rgb converter but it is 404, can't find another one off hand. You can however use the max ies light just input the temp and pick from the color swatch.

looks like 6500k = 254,248,255

For light values check out the post on studio lighting a few below this one.

[Neilg]

Re: Fryrender/maxwell and VRAY!

Also, im guessing that 1st and 2nd GI bounces in vray are phisicaly correct...and are equal to those in fryrender?

Not at all, vray is biased. It (for the most part) cuts corners and uses little tricks to get it as close to physical as possible without actually being it - physically correct is just really really slow.
You can use the light cache with PPT on and some other things, but someone else will have to fill you in on those. The spot3d site may cover it.

Vray and fryrender are not really that similar, and you'd do just as well (if not better) sitting down and studying photographs compulsively throughout your next project. You'd be suprised by how much better it makes your lighting.

[mdi]

kelvin to rgb...
http://planetpixelemporium.com/tutorialpages/light.html

yeah, sorry...I should have phrased the 1st/2nd bounce thing better, i know vray cuts alot of corners (thank god!).....its just understanding if its a good approximation of what a "phisicaly correct renderer" does/end result. There no point placing lights around a room which are technicaly "correct" when the 1st/2nd bounce is is to powerfull/not powerfull enough.


Ultimately, what I plan to do (purely as a learning experience) is model up my living room, and render it as if it where night...and compare that the a photo I took at night, replicating the camera and lighting setup.