VFB & background image

V-Ray V-Ray for 3ds Max General
1

Is there way so adjust the background image in the VFB (size,exposure, color,placement) and to save the render with the new background image?
one thing more: why the background in the VFB is unexposed and the white edges compare to the background in Photoshop ?see attachment

Thanks.
Roy

backg.jpg
backg.jpg660×758 198 KB

2

What file format is the image in?

Other than that, there is no way to adjust the background or save it - it’s just for quick previews.

Best regards,
Vlado

3

Thanks vlado
the format of the background is simple jpg.

Little wish: It would be nice if we can play and adjust the BG image as well as saving it , in simple rendering it can save the involve of PS.

4

In that case can you get me the file?

It would be nice if we can play and adjust the BG image as well as saving it , in simple rendering it can save the involve of PS.Well, yes, but I’m trying to keep things contained and simple; it is not our intention to replace photoshop :slight_smile:

Best regards,
Vlado

5

Hi Vlado.

Here is the file image that i use.

Thanks.

Roy

sky.jpg
sky.jpg817×612 129 KB

6

Hello Roy,

Thank you for posting the image.
Is it possible to attache the scene file for this issue as well? I would like to see the entire scene setup.

7

The issue seems to be that you don’t have sRGB enabled in the V-Ray VFB. When reading 8-bit images (JPG, PNG etc) as background, V-Ray will convert them from sRGB color space to linear. However this assumes that the sRGB button in the VFB is enabled, so that the final result appears correct.

I can reproduce the bright edges too and it looks like this is a bug, but I have to look into it.

Best regars,
Vlado

8

So the edges are not a bug; the compositing assumes that the objects are rendered against a black background. If this is not the case, parts of the original background remain and tint the edges.

Best regards,
Vlado