Hi all
Can I only comp the various channels back up to get my original beauty pass if the channels are 32 bit?
So you can’t do it at all if it’s 8 bit or 16 bit?
A lot of it depends on how your compositor works and whether it does a correct “add” or not, also I’ve found the current version of the raw reflect, refract and their filter passes don’t add up to the correct versions - they’re similar but not 100% accurate.
What’s going on here? Is VRay going backwards now?
How we suppose to do our work if we constantly have to hack our way around problems?
Or no wait, did the previous versions of those channels work the way they should, or has it never worked in the 1st place?
Can you reasonabaly get the same results with AE that you can with NUKE? (I’ve already given up on photoshop)
It will realy help if chaosgroup have a list of common software people use, and let us know how with that paticular software we are suppose to do things (ok I’ve just read that sentance and it makes no sense)
Yup still going backwards, u cant match them 100%…
The normal channels are totally fine, it’s just the raw versions as regards the reflections / refractions and as far as I know they’ve never totally behaved - thankfully you’ve got the standard reflection and refraction element and they work fine, admittedly with less control than what you’d get by having the raw and filter elements. After effects is slightly less powerful than nuke in this case as it doesn’t have a “divide” function - you’re able to use this to make your own raw reflection which works slightly better than the built in one. The current passes though offer you nearly everything you’d expect or want, but what was interesting was Rob Nederhorst in a talk on Priest that he was lead compositor on is that he’d always try to spend more time on the 3d so that the raw renders were as close as possible, and then used compositing to add all of the grain, optics, glows and subtle colour corrections and balances that aren’t possible in 3d!
32 bit, raw and non raw dont work.
Check this topic here . http://www.chaosgroup.com/forums/vbulletin/showthread.php?67790-PSD-composite-don-t-match-final-image
The aardman guys are getting what they want by making their own ref passes in nuke:
Photoshop you’re screwed for though since it doesn’t have a divide. It’s actually a pretty bad package for comping in!
Yes I’ve been following that thread also.
I’m not sure what you mean however with “32 bit, raw and non raw dont work”. Could you maybe rephrase it a little?
Its not working in
8 bit
16 bit
32 bit
using Raw reflection/rawLight/etc/etc
using Reflection/light/etc/etc
Photoshop has Divide (since CS5 I believe). What’s it with all the Photoshop bashing?
Is it a compositor - No. Can you compose render elements - sure. You have to know your way around jut like in Nuke or any other software.
The problems you get with the RAW elements are the same in all packages. If you need to multiply then trouble starts.
Best Regards
Daniel
Just things like the handling of alphas and not previously having divide made it a bit messy!
Now you’ve confused me even more. You agree with what joconnel said about about ALL the raw passes and filter passes not working.
But now are you ALSO saying that in addition to this, the normal reflection / light /etc etc in other words ALL others also doesnt work?
So is there anything that works?
Can I build up my beauty pass using my other passes if they are only 8 bit?
I dont understand what you are trying to say. It seems you are saying that nothing works no matter if it is 8,16 or 32 bit.
Please could you once again rephrase what you are saying, or elaborate a bit?!
Im saying exactly that. U cant comp beauty out of passes, it will always looks different, quick fix is to merge them all and substract from beauty to get missing parts, or just do this here > http://www.chaosgroup.com/forums/vbulletin/showthread.php?67327-Comping-render-elements-to-exactly-match-vray-beauty-without-fringing
totally confused !!!
ok but is that only to get the raw passes to work correct?
I don’t understand what is suddenly happening???!!!
What about all the tutorials all over the net (although they were for vray 1.5 and earlier) that shows how to comp elements, like for example this famous one by Chris Nichols http://www.chaosgroup.com/forums/vbulletin/showthread.php?32485-Basic-Comping-of-a-Vray-render&highlight=chris+render+elements
Is all this now suddenly broken in VRay 2.0? Did I just woke up from a coma and missed couple of years. It feels like I’m in the dark ages when they just invented VRay and just now they invented elements and they still trying to see why they would need it and how to make it work???
Guys, please do more research before blasting the workings of vray. Pass system does work, we use it all the time. There are some limitations, but nothing that can’t be solved.
Yep - it’s only the two raw passes and their filters that don’t work correctly, and also using multiplication in compositing can lead to issues as per vlado. The passes give you a lot and you’re probably never going to be so drastically off target that you’d need the raw passes anyway - if you ware tweak your 3d settings first!
There is no documentation for half of the features that spells things out that any normal person can understand, we have to rely on help from the forums. Thankfully some of the veterans here on this forum gives their time and effort to help. Just sometimes there are so many users and so many threads that it’s difficult to distinguish CORRECT information from not so correct information. The forum is pretty much like a Google search, somewhere in there between all the irrelevant search results, lies the answers you’re looking for.
Years ago I used Chris Nichols’ method for comping. It seemed pretty solid to me (but maybe it wasn’t as solid and I just didn’t notice problems???).
But I haven’t used it in a while and was confused when people suddenly started saying that you can’t comp channels to get back to your beauty pass.
joconnell please could you point me to this information. I don’t recall seeing this before.
I think it’s mainly along edges where you get some problems Morne so for example if you’re trying to use the Raw passes and their filters, you need to multiply one by the other. If you avoid using the raw passes and just go with Lighting, GI, spec, reflect, refract then you’re only ever using add / plus and it gives you something pretty much spot on - fair enough you get ultimate control by using the raw passes but hopefully your 3d render won’t be so far off what you want as a result that you’d actually need all that extra stuff.
It makes more sense now, thanks for the explanation.
In this vid from the lovely folks of Saddington Baynes who’d probably do a tonne of very small tweaks in post they’re avoiding using any passes that cause problems - now the actual raw render looks gorgeous to start with so they don’t need the extra control that raw gives. have a look at their vray buffer drop down to see what they’re taking out - http://www.youtube.com/watch?v=Ahfr3g2QrTM