VrayBitmap, 8bit file and ColorSpace

[bardo]

Hi,
I'm doing some "gamma" tests and tryinig the different type of "color space transfer function" but I can't see any difference.
I'm using 8-bit JPG and I'm using default sRGB color management.

I've tried also to add the suffixes "_srgb", "_lin_srgb" but with no difference on the final render or material editor sample.

Where am I wrong?

[hermit.crab]

Seems to work fine. You should see the selected color space in the VRayBitmap options (Color space transform function); it updates automatically if the "Auto RGB primaries from VRayBitmap texture" (Render setup> Settings> Color Management) is checked. Check more info here.

[bardo]

as you suggested I've tried to check the "Auto RGB...." option but nothing changes.
I don't see any visual change both in material editor and in VFB interactive rendering.

Should I see some visual difference somewhere?

Also the RGB values shown in the VFB are the same.
As attached the file with texture used.

testGamma.zip

[hermit.crab]

The problem in the provided scene is that you're testing with pure white textures (darkened via the RGB Levels, which is a post-effect so to speak, hence the lack of transform). Render a VRayColor map (right-click>Render Map...) with grey color and see the differences in color spaces.

[bardo]

you're right, with a middle grey I can see clearly the differences.

I'm testing an old workflow I've used since many years and now it seems that I need to change it because, to have a perfect match by VrayColor and a Bitmap , I should add a ColorCorrection to any color bitmap.

thank you for clear my doubts.