Vray rendering artefacts

Hello!

I have a problem with a model shower cabin ( downloaded from net) in a bathroom scene. The final image with high resolution rendering, results with a very lighted scene and rounded artefacts; but if i render small areas of the scene, it looks good. I also verified the model in another max file rendering it alone, and observed that with different camera views or moves, it is rendering fine or again very lighted. So i have tried to look trough materials attached to the model but didn't find the solution.

Please help, if you know such kind of problem.

Thank you a lot!

can you post some screenshot and materials?rendering settings?

hard to know what the problem can be only from your description.

Some values of V Ray are image size dependant.

render settings are ok, it looks good in render process, but final image become bad

here you can see

First, you should use some exposure in your image.

Render settings are not OK... otherwise, your image would look right. Hard to tell from that overbright image, my first guess would be samples, on some of those lamps that I am guessing have a light inside

try rendering with a override material in the whole scene, if problem still exist then is a GI setting. few samples.

If it render fine then you need to review your materials, that may be creating those spots.

thank you for the feedback; finally everything went well; maybe because i made some corrections in materials, unchecked some refraction or reflection