Friends,
Having a small problem with my matte pass and I can’t figure out exactly what’s wrong. Here are the steps I’m taking to get this result, I was the fridge on a completely black background with the alpha just around the fridge and it’s shadows.
The fridge is not visible to reflections
EVERYTHING else is set to (in vrayproperties)
not sure i got you right. But sounds like you want to hide everything besides the fridge. Looks like you missed to set “Reflection” and “Refraction” (lower right edge of the VRayproperties) to 0. If they are set to 1 (default) the object will be gone but all reflections and refractions are still rendered.
Yes, that’s what I’m after. However look in the RGB render, why is it even rendering at all? I’m getting strange blue colors from direct light in the render, shouldn’t it be black if the objects are all set to “Matte Object”?
Composite done in photoshop, and it looks just fine. The odd alpha is actually correct (ignore the bowl, it’s been corrected) because it’s including the shadow of the fridge as well, but why is the rgb all blueish? If all the other objects are set to matte true in vrayproperties?
Yes there are, but turning them off doesn’t allieviate the problem. I can get the strange blue lights glow to go away only if I stop storing the vray lights with the imap, but this doesn’t make a bit of sense (or alternatively turning off “Shadows” in the matte properties tab in vrayproperties). I’ll setup a test scene for download tomorrow to see what I’m doing wrong fundamentally in my comp process.
I’m posting in reply to this thread because I think we have the same problem.
Here’s my scene rendered out with everything normal. I have a vray sun+sky at default. Physical camera: f-stop 4, shutter 60, iso 400, exposure on. Linear color mapping. Gamma 2.2. The room is fully enclosed on all sides and the camera is inside the room. Ignore the low IM settings.
I select just the room, and apply these settings:
This is what I get (IM primary, BF secondary). Just so you know, my environment background in black:
If I switch my GI to BF/BF, I get this:
This makes no sense to me. I should be getting the three spheres looking like they do in the first rendering, but with a black background. I have been using the matte settings to add objects in post for exterior work, but this is my first go at trying this for interior work and it’s not going well. It seems like a bug somewhere to me, but if I’m doing it wrong, please let me know.
This is a very urgent matter as I need to start rendering a matted scene like this on Monday. Vlado, please help!
Thanks for your help, Morbid. Glad to know it’s not just me (which wouldn’t have surprised me).
It seems it’s not just the vray sun. When I change the light type to a standard light, it does the same thing (not quite as severe, though, but it is a little brighter). It’s either a physical camera bug or a matte bug. Seems the vray sun amplifies the effect. Let me know if you have any other ideas.
I sure hope Vlado checks the forums on the weekend…
Well, see, here’s the thing. I’ve already rendered the building. Now I’m trying to render animated 3d people to composite into it. Not sure how to cheat that… Got any advice?
There is few ways to go about this:
1 - you can use sphere fade pluging and go through vlado’s tutorial where he does exactly what you need.
2 - you can render your people with the house set to be invisible to camera (background black). This will render people without occluded matte. You will then make an occlusion matte of your own, where animated people will be pure white and house pure black (no gi or anything like that, just black and white.) Then in comp use that matte for your animated people.
