I was interested in using VrayLightSelect with Photoshop and was wondering if anyone had any suggestions:
1) Which basic render elements (minimum) are needed?
2) Which order (top to bottom)?
3) Which blending modes are needed for those layers?
4) What should be used to control the VrayLightSelect layers in PS (layer exposure)?
I can use the ProEXR plugin to automatically import all of the elements.
Is it even possible or just more difficult without PDPlayer?
What would be even better is if the VRayFB had controls for the VRayLightSelect directly built instead of having to resort to a 3rd party application every time (and having to pay extra money for just this one feature.)
1) Depends on what you want to do. If you just want to control light intensities in post then group your lights and add them to LightSelect elements. Every light should be in there at least once (to resemble RGBA output ONLY once)
2) Doesn’t matter for lightselect (see 3)
3) Linear Add (which just adds the layers, hence the order does not matter)
4) amount (that’s prolly just the opacity slider then)
For the last that would be quite a huge feature request for postwork in the VFB. I still prefer doing that in other apps that i have to use anyways. That might be different if you don’t. But is there anyone directly outputting to client from the VFB ??
and if i may ask, you added the light elements to the final rgb image or did you add them to the diffuse filter + raw gi + raw lightning + raw reflection and such?
i was also thinking about render elements lately and the first thing i learned so far is that they are a pain for still images! well, at least for me.
especially when you are used to work with the linear mapping and gamma 2.2 don´t affect colors workflow and have the srgb switch pressed in the framebuffer to get the image you want… how are your linear (or not) workflow and your color settings?
is see! thanks thorsten for clearing that up. i find the documentation is a bit lacking about all that, isn´t it? but you can get the info out of the chaos group new feature video demos i guess.
not to hijack this thread, but one more question if you don´t mind…
so, how to comp all the raw elements together to get the final beauty rgb? that eludes me somehow until now… i know that you can multiply the diffuse filter with the rawGI and also the diffuse filter with the rawlightning, and linear dodge/add those two pairs things together (or just use the not-raw GI and lightning elements), but what about the reflection pass? you multiply the raw reflection with the reflection filter element and than linear add it to the two pairs of elements, GI and lightning? that does not really add up for me, but that must somehow be a problem with gammas and color mapping on my side i guess? or is something missing in that equation?
make sure your comping linear exr images. When u open it in photoshop it should be in “32bit mode”. For that to work you need photoshop EXTENDED (standard cant layer 32bi images)
for standard photoshop you 1st have to bring the mode down to 16bit to be able to layer correctly, but then it again is pointless cause the math doesnt work correctly when adding(linear dodge) etc so then your beaty pass doesnt add up. So you need Photoshop EXTENDED version
ok, now i get it, thanks. so no wonder i couldn´t make it work right with 16bit images.
photoshop would be no problem, as we have the extended version, but that´s really strange. thought the only difference was that 3d and measuring stuff in the extended version…
Guys, there is a confusion with VrayLightSelect elements.
Although each pass is seperate for each light, it doesn’t take GI separately.
In other words, the GI contribution of the other lights are there too.
So if you have 3 lights and make 3 passes and add the passes, the result is much different than making the render of 3 lights together.
From a quick test it seems to be the other way round. It does not contain GI at all i’d say.
I put in 3 lights. Have 3 corresponding LightSelects and the GI element. If i add all 4 i get my RGB. Hence the LightSelects contain only direct light contribution.
I did not watch the video to be honest hehe. As said earlier in the thread, recreating the beauty from lightselects works only if every light is in minimum ONE Lightselect and none is in two. GI needs to be added on top and is not seperated by light or part of the lightselects.
It does not contain GI at all i’d say.
Did they even say it would? I would think it would be direct and not effect GI, although it would be nice if there was a way to link the two somehow.
Preferably, I wish there was a way to do this directly in the VFB - control the various VrayLightSelects with a simple exposure slider instead of having to jump through other programs to get this done. It would be a killer feature.
yes, that would be extremely useful, and it’s basically what renderers like maxwell does.. even though I’d still prefer to do it in post, if vray could output different elements for the whole contribution of any single light in scene.
I mean GI pass is always every light is on. So when you have the lightselect pass for light A + GI pass, GI pass contains other lights too unless you turned them off each.
I think it would be great, if there is a lightselect pass which contains GI for each light as well.
