I get tiny dots when i render in vray

I have placed several spotlights and the surfaces around them are reflective. when I render there are tiny spots on the surfaces and also some darker spots that are mainly visible on the upper surfaces. I don’t know what’s causing this. Does anyone have any idea?

Thank you!

I guess, you use “Irradiance Map” and/or “Light Cache” for primary and secondary bounces (in Vray).

This kind of spots and blothes often appears with too low settings in those engines.
Try using “Irradiance Map” fpr primary bounces and “Brute Force” for secondary. Then you can choose, from the Presets-Dropbox, predefined quality settings (for example “Interior Preset High Quality”).