3ds max vray interactive & production render lightning problem

michal_

Hello guys. I have a problem with interactive and production render in vray for 3ds max. When I set lights in interactive mode and then I start production render, the lights and whole image is lighter. 
Can you help me please? 

Eric Chadwick

Need more information. Can you share the scene? Preferably stripped down to the simplest setup that still causes the problem.

Also, what versions of Max and of V-Ray are you using?

An easy way to debug render issues is to reset the settings... Switch the renderer to a different one (scanline for example) then back to V-Ray. 

michal_

I am using Max 2018 and vray 5 
I use vray renderer cpu+gpu.
I already i tried what you suggested with switching different renderer and nothing changed. 
I am sending you the scene.
Problem is when i have cameras or i don´t have cameras or sun or any other light sources. 

Eric Chadwick

In Max 2018 I only have V-Ray 3.6, but I did see your problem.

My frame buffer history:

4. = IPR using V-Ray RT (what your renderer was set to)
3. = Render using V-Ray RT.
2. = I switched the renderer to V-Ray Adv. 3.6 (instead of RT)  and pressed Render.
1. = IPR. Same visual result as Render.

I suggest not using RT because I think it's more limited than Adv+IPR.

You also had Region Render enabled in the Max framebuffer. Changing this to View made it match the IPR frame.

michal_

Thank you.
So you suggest me to render on CPU instead of CPU+GPU?

Eric Chadwick

V-Ray 5 uses both in the regular renderer, and in ipr I think.

Eric Chadwick

Have you read the docs?

Also in general it's best to post V-Ray questions on the Chaos Group forums, they provide free high quality tech support. 

Polycount is mostly about game art, not architectural visualization.

michal_

Thank you once again.
Things you showed me works.
I am sorry but I didn´t read them.