vray physical camera and composting workflow

[wimmm]

Hi all,

I'm trying to learn how to use vray render channels and composite everything in aftereffects afterwards. I think I quite understand linear workflow and which passes I need. The only thing I'm wondering about: is it a bad idea to use vray physical camera? I don't mean for motion blur or DOF, that logically seems like a bad idea, but for the exposure. What I get now in my renders is that the diffuse pass looks quite right, but the GI and Lighting pass look burned out. When I put them back together the image looks nothing like if I do everything straight in vray. Could it be because of the pysical camera?

thanks in advance,

[wimmm]

Re: vray physical camera and composting workflow

Hi there,

thought to give you a bit more info.

When I make a scene and I render it out without the physical camera I get the following result

RGB color :



RawLighting



RawGI



But, when I use the same scene (same light) and turn on the physical camera I get this

RGB color:



RawLighting:



RawGI:



As you can see, the RGB image isway darker, which makes sense because I didn't adjust the exposure of the physical camera. The RawLighting and the RawGI on the other hand are exactly the same as with the normal camera. Of course, I could adjust the exposure ogf the physical camera now, but I wouldn't really see why, as the whole compositing workflow interest me in the sense that I could have all freedom in post (light, DOF, etc)

Is there some argument to use the physical camera when you are planning to use the compositing workflow. Or is this specific to blender Vray and different in max?

thanks in advance for all advice

[rws]

Re: vray physical camera and composting workflow

Hi there,
I don't use this features myself so I'm not 100% sure the workings of it, but do you have CM(colour mapping) ticked for the passes?
By the look of it you might want to tick AA(anti aliasing) too.