relection background with vray phisycalcamera

[STUDIO_12]

I cannot render the relection background with vray phisycalcamera but if use a camara from 3dsmax the Render is correct.
the light is vraysun, environement physical sky and backgound hdri image.

[vlado]

You can un-check the "Affect background" option under the Color mapping section of the V-Ray settings and see if it helps.

[edit] Just realized that you said "reflection background" - in that case you can just increase the RGB output of the background map until it is visible again, or otherwise, uncheck the "Exposure" option of the physical camera.

Best regards,
Vlado