Strange exposure difference between RT and VFB

V-Ray GPU V-Ray GPU :: Issues
1

RT has been working fine for me for some time, but then today a gremlin strikes!
Here’s a screen grab.

Clean scene, vrayplane, cube and vraysun (parented to a sun system with standard light off), vrayphysical camera, linear CC, gamma 1.

I cannot understand why the exposure is SO different!?
Any ideas?

RenderRTprobem.jpg
RenderRTprobem.jpg1403×493 67.2 KB

2

Ok, so removing Vray and reinstating it from the scene fixed the problem… I just wonder what parameter I messed up to cause the problem!

Strange.
:slight_smile:

3

Ok, I think it might have been RPManager introducing some strange parameter values. I don’t have time to double check, but I’d put it down to that for the time being.

4

It might be due to the “Use legacy sun/sky model” option (it should be off).

Best regards,
Vlado

5

Thanks Vlado, but I tried that.
I think I worked it out. It wasn’t RPManager (I think)… if I changed the camera to “still” camera the exposure was correct. In movie and video mode, DR exposure was wrong. Can you see if you can recreate? No urgency, I don’t have the problem at the moment, but I’m curious to know if it’s just my file or a larger problem.

6

Ah, yes. I have this logged and it will be fixed.

Best regards,
Vlado

7

Do I win a prize?! :slight_smile:

Thanks for checking, glad to hear it’s not something I’m doing wrong.

Cheers
p.

8

Hehe, yes, you will get a fix :slight_smile:

Best regards,
Vlado

9

Does RT Support materials with colourcorrect applied? I have found since I have being using 2.2 setting in the colour correct plugin/script that RT and Vray don’t match, ever. Maybe additional settings for future builds could include some kind of gamma control? Or I am completely wrong and you all think I should’nt have said anything.

10

The ColorCorrect texture should work; if you have a scene where is doesn’t, please send it to vray@chaosgroup.com so that we can look at it.

Best regards,
Vlado