Vray ADV / RT Exposure problem

[hubmer3]

Hy,

image says it all!

Overexposure in RT (Activeshade) normal exposure in ADV (Production), why's that?


Thanks

[yavor.rubenov]

Hello,

What camera are you using in this scene (if any) ?

Also - looking at your signature - you have nVidia cards but on your screen shot you are using OpenCL? CUDA will give much better results on nVidia cards.

Best regards,
Yavor

[hubmer3]

I‘m using max physical cam.

thanks for the hint with the opencl, i thought with my xeons the performance will be better...?

[yavor.rubenov]

In V-Ray RT 3.6 we supported only the Physical Camera Exposure control together with the Max Physical Camera - so without it you get no exposure at all.

If you want to use your CPUs together with the nVidia video cards there is a device called "c++/cpu" available in the device selector - if enabled it allows you to run the CUDA render on your cpus too.

[hubmer3]

Yes im doing that! See my post

[yavor.rubenov]

In the screen shot I see the "V-Ray Exposure Control" which was not supported. You have to use the "Physical Camera Exposure control" - the one that goes together with the Max Physical Camera.

[hubmer3]

ahhh, ok thx. why is this not supported? it would be a super handy solution also for rt, or am i wrong?

[yavor.rubenov]

The idea was to only use the Autodesk camera and exposure control together. Initially we even hid the V-Ray Exposure control and camera altogether but later on brought back the exposure control as it was helpful for non camera viewports.

In V-Ray Next we brought back the VRayPhysicalCamera too and with it we took care of cases like yours..

[hubmer3]

thanks yavor for your answers, it seems i should move on to next......

have a nice day!