VRayBitmap has weird gamma issue

[wendy_herdian]

Hi, how is VrayBitmap has weird gamma/tonemap issue but regular bitmap works just fine?
I attached the comparison. Every setting of vraybitmap and bitmap is default.
Using Vray5.2 and 3dsmax 2021

[vladimir.nedev]

Vantage doesn't yet have support for the "Auto" type of the "Color space transfer function" of the VRayBitmap (introduced in V-Ray 5 update 2).
It's a very important issue, so we will take a look at it ASAP.
As a temporary workaround, you can switch to "sRGB" or "None" type depending on your bitmap.

Greetings,
Vladimir Nedev