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Vray passes Recoloring in PS ?
show user profile  FX
Can anyone tell me what passes/layer order/workflow I need to be able to just recolour a product render in PS without it washing out the reflections. spec, highlights etc.

All the vids I find all have different comp workflows and none seem to cover basic recolouring.

I've tried many times but always have issues with washing out of highlights etc, a slight LWF issue with the beauty not matching the passes, not as excessive as I've seen others having, just a slight shift.

think I need to eliminate PS from my workflow, it has too many issues with exr's and LWF.

tia

read 475 times
4/13/2016 4:48:22 PM (last edit: 4/15/2016 12:22:52 PM)
show user profile  zeefusion
You need to separate out the diffuse filter for both direct lighting and GI if you wish to change its colour. So your Photoshop comp will look like this:

VRaySpecular – Linear Dodge (Add)
VRayReflection – Linear Dodge (Add)
VRayRefraction – Linear Dodge (Add)

Diffuse + Lighting (Group) – Linear Dodge (Add)
VRayRawLighting – Multiply
VRayDiffuseFilter Copy – Normal

Diffuse + GI (Group) – Normal
VRayRawGlobalIllumination – Multiply
VRayDiffuseFilter – Normal

If you make the diffuse filter layer a smart object before duplicating to the lighting group you only have to adjust the colour once and it will auto update the other.

You also need to comp this in 32-bit otherwise it will not match the beauty pass. To do this you must load a linear colour profile. Then for editing you must down convert to 16-bit, then reload the sRGB profile before doing any adjustments.

Compositing and editing in PS is the pain in the butt if you ask me. Here is a tutorial that explains the colour profile but it does not have the separated diffuse, the principle is the same though.
http://www.workshop.mintviz.com/tutorials/create-a-virtual-photography-studio-in-v-ray/

read 470 times
4/13/2016 4:58:08 PM (last edit: 4/13/2016 5:05:04 PM)
show user profile  FX
thanks, I was about to kill off PS, but that's exactly what I need, I was using a more limited comp workflow.

I'll run through this one :
http://www.workshop.mintviz.com/tutorials/compositing-the-v-ray-render-elements-using-adobe-photoshop/

PS has a stay of execution. :P

read 466 times
4/13/2016 5:04:41 PM (last edit: 4/15/2016 12:23:01 PM)
show user profile  zeefusion
That tutorial is also fine and shows the separated diffuse but don't use TIFS, use EXR. I should really take that tutorial down...
read 464 times
4/13/2016 5:06:07 PM (last edit: 4/13/2016 5:09:06 PM)
show user profile  FX
Yeah no probs, I'l try it with PSD manager first, I think it uses the same gamma adjustment as exr, if it doesn't this may eliminate another problem I was having.

thanks again.
read 453 times
4/13/2016 5:12:07 PM (last edit: 4/13/2016 5:12:07 PM)
show user profile  FX
"Compositing and editing in PS is the pain in the butt if you ask me."

Agreed, but essential if your output needs to be editable PSD's.

...at least you have all the info in one place :)


read 437 times
4/13/2016 5:37:54 PM (last edit: 4/13/2016 5:37:54 PM)
show user profile  FX
OK, I'm 99% there but how do you handle the smart layer with the linear workspace ?

When I open the smart layer I get an embedded profile mismatch, using the embedded seems to work ok and doesn't affect the image. :/

I think LWF is too easy, I'm going to start doing it balanced on one leg whilst juggling dynamite.

edit :

ahh... I guess this applies :

"To edit the Photoshop file after you have closed it you first must load the Linear RGB ICC profile and then open the PSD file. Once open you can revert back to sRGB IEC61966-2.1."

I get it now, all the info is embedded and we are just changing the working space info.

Right I'm 100% there now, cheers again zee.


read 417 times
4/14/2016 1:24:30 PM (last edit: 4/14/2016 1:56:29 PM)
show user profile  zeefusion
Glad I could help :)
read 395 times
4/14/2016 4:55:55 PM (last edit: 4/14/2016 4:55:55 PM)
show user profile  FX
The only issue I have with this method is I also have colour info in my Refraction, Reflection, RawLighting & RawGlobalIllumination layers.
It would be quite a feat to be able to change them all at once simultaneously in PS with the same colour while retaining the layer structure...beyond my abilities that's for sure.

Did you have similar issues ?
read 367 times
4/15/2016 9:04:27 AM (last edit: 4/15/2016 11:51:16 AM)
show user profile  zeefusion
Hmm we only ever use to use this workflow for product shots and the resulting GI passes were always greyscale, so never came across this issue. By separating the diffuse from the GI we had a flat colour to easily change.

Removing all colour information from every pass might not be possible, I am not sure. Might be worth firing an email over to Chaos Group, they are pretty helpful with stuff like this.
read 359 times
4/15/2016 11:07:29 AM (last edit: 4/15/2016 11:11:11 AM)
show user profile  FX
yup thx, I'll look into this later, I think it's more a PS solution for me than Vray, my PS skills are rusty...but right now I've had my fill of everything 32 bit exr & LWF... I can't take any more. :p

I'm at the stage where I have all my elements looking like the beauty pass and fully editable, I can work on the best re-colouring method for the other layers, shouldn't be too difficult.

It's taken me 4 days to build a 40 layer PSD for a client, 40 layers of the same 2 products in different colours, in theory when I nail this, it should take me 4 hours :)

I've learned more here in 2 days than I have in the last 2 years, but it's Friday...time to get shit-faced. :)
read 354 times
4/15/2016 11:50:38 AM (last edit: 4/15/2016 11:51:00 AM)
show user profile  zeefusion
On a watch face project we adopted this workflow for a while but when V-Ray introduced render masks we changed our workflow.

Rendering out and compositing all the elements just so we could change the colour of the hands and numbers was a bit OTT. A quick render mask and a lot less time later we had our new colour and more time for beer!
read 349 times
4/15/2016 11:59:20 AM (last edit: 4/15/2016 12:00:30 PM)
show user profile  FX
It may seem overkill but I have other plans for this, having everything separate is essential, I'll also be adding light selects etc....basically trying to get a render with as many editable PSD elements as possible.
read 342 times
4/15/2016 12:20:27 PM (last edit: 4/15/2016 12:22:43 PM)
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