Basic Comping of a Vray render

[schmyvol_eye]

das ist ja geil! 8-P vielen Dank!

Sweet! now all that remains is solving the problem you mentioned above. I've been testing this for several days but with no luck. I dont know what I can do to get the comp right, and the solution cant be that we all have to get after effects or a proggie like that, that would be asking a bit much...

[dlparisi]

Set the Raw light and Raw GI pass to mutliply and put a copy of the diffuse under each. Put the Raw Light+Diffuse in one layer set and set it to linear Dodge. Put the Raw GI+Diffuse in another layer set and put below thhe Raw Light set. Put all of your other layers on top of these and set to Linear Dodge. Matches perfectly.

Edit: It matches but not exact. There's still some minor variations but it works as intended.

[tom schuelke]

juhuuuu....

well now ill try this.. and of course ill try this automated with psdmanager..

[schmyvol_eye]

if this works I'm gonna be your fanboy... lemme just try this

Edit: thats the problem, not "exact" matches... but thats what we need

[dlparisi]

He he

hi schmyvol_eye, here´s the link for the longhorn .... look. i did the screenshots from my partners computer.

but your right. it looks good.

http://www.softpedia.com/get/System/...sforming.shtml

tom

Tom,

It sure does look cool. Do you know of any problems running this? Problems with Max? Photoshop? etc?

[schmyvol_eye]

It certainly doesnt mention anything on the download page (unless I missed it, which is very likely ) but I wondered about that too. I once tested this XP skin thingie and it messed up loads of stuff... but the program itself warned me that things may go a little haywire should I decide to install it, so I suppose there would be a warning if other people had problems with it.

then again, you never know...

Edit: Ok, no, it does mention that it could mess up your OS severly, so eventhough it looks great, I dont recommend installing. Just check the user reviews on the page Tom supplied. Too bad, it looks so nice, but I dont feel like making my computer sick

[schmyvol_eye]

result

here's my result with dlparisi's method. (Its a pretty basic setup, its all just a test so dont worry about some of the colours and about the missing reflections etc).

normal render:



the comped version (note how the comped version is brighter, especially the direct light seems to be affected by this):



and another version using "Screen" blending (much better in my opinion, but still not good enough)



Clearly all these methods, excuse my harshness, suck behinds because we obviously cannot achieve the same result as in the original render, which makes rendering passes, excuse my harshness once more, pretty much useless... (in photoshop that is, of course) unless we're doing something really wrong. Could anybody from Vray verify this? Will this be fixed in future version?

Any information about this is highly appreciated!
shot!
y

[dlparisi]

Are you using any color mapping? According to Nichols (he mentions this earlier in this thread) and I think Vlado the channels are not correct if you set it to anything other than linear. Maybe that's the problem.

[schmyvol_eye]

yes, I am using linear multiply (i think its called)... but I recall also testing this with all the other color mappings, with the same result. I am not 100% sure about this at present so leave this one open, Ima try this tomorrow and post the results (dont have time now unfortunately).

thanks a lot for the advice cause eventhough I think I've tested this, it just might be it... one of those small things that I tend to overlook.

later,
y

EDIT: you're right, cpnichols mentions this on the first page (and I think on the first line ). one needs to be in linear space since some channels are always saved in linear space... ok, so disregard my statement "...rendering passes sucks behinds...". ME = TOOL. Anyways, I'll post the results when I've done the tests.

[schmyvol_eye]

question: what's with the color correction curve in the vray VFB, can I use that or will that also alter the result?

Edit: So here the test. Once again the results are not equal and the comped version apears brighter in certain areas, sunlight and other lights are incorrect and there also seems to be a loss in color... this is once again done using: RAW LIGHT (multiply) DIFFUSE in a layer set which is set to screen blending on top of a layer set containing RAW GI (multiply) DIFFUSE. Linear dodge just seems to burn out bright areas too much, thats why screen blending was used.

Maybe the fact that I'm using the color correction curve has something to do with it?

first original render:



and comped version

[schmyvol_eye]

its me, again

back for more. i've done another round of tests in linear space not using any color mapping, no dark multipliers etc. nothing just plain and simple (yeah right, has anyone ever tried setting up a good lighting situation without any of those tools??? I find it almost impossible...)

anyways, the results still dont match up. I dont know what else I could be doing wrong since everything is the way it should be, at least I think so... could IES lights have something to do with this? I'm using the IES Sunlight to light the scene. here the results.

original render



comped render (this time with linear dodge, screen gives similar results but bright areas arent as burnt out, I still chose linear dodge, just for show)



regards,
y

[powerandrubber]

It's been mentioned a few times that PS just isn't a good compositor, I guess they're right. I was wondering if anyone has tried using vray comptex as shown in the tutorial with animated objects. It would be a round about method but might be usefull, especially with the color correct plugin which would let you do basic brightness/contrast, gamma, HSV, and level adjustments on the fly. Plus you have the standard bitmap output settings including RGB curves. Other adjustments could be done to the individual channels in PS and quickly reloaded in the material editor. Should be able to render out the finished image in the mat editor like you would render a texture. It's not yet available for max/viz4 so I can't try it. Anyone tried this?

[cpnichols]

Yeap... pretty sure the photoshop clamps everything which is why it is looking darker. The HDR stuff in photoshop does not support layers.

[schmyvol_eye]

hey, thanks for the info. but whats a good program to comp with? One that is affordable or maybe even free? After effects is a little expensive if I'm only gonna use it to comp renders (or baked maps whichever)... so is there a good alternative?

thanks a lot for any help in this as I am really struggling to get this to work.

cheers,
y

[cpnichols]

Your question had me thinking... I am spoiled by high-end expensive compositing packages. There is a cheapo (free) photoshop style program that we use sometimes on linux (Photoshop does nto exist on linux). It is sorta sucky but may be perfect for doing exactly what you need. The program is called Gimp and there is a floating point version of it clled Filmgimp or Cinepaint. I looked it up and they have a Windows version...

I HAVE NOT TRIED IT AND MAKE NOT GARANTEES!!!

But here is a link:

http://sourceforge.net/project/showf...group_id=57007