.vrscene import gamma correction

[BVA]

Hi Vladimir

I notice that importing a model using .vrscene will put all the maps on "default" color space. All my other scenes/ maps use the default color space.
Is there a reason why? Maybe it would be more constant if all maps use the same color space.

[vladimir.nedev]

You mean that they are put in the "(none)" color-space by the .vrscene importer.

There are two options how to import the gamma correction from the .vrscene file:
- set the gamma channel in the Image Map tab
- set the color-space channel in the Image Still tab

You may not realize it but the Image Still is shared between all Image Maps that reference the same image file on disk.
In theory, the vrscene can contain two textures that reference the same file, but have a different gamma correction.
In this case, using the Image Still color-space is not possible, as it needs to have a different value for each texture.

Using the Image Still color-space channel has other drawbacks:
- it doesn't exist in MODO 701
- the "(default)" color-space is defined as a scene preference, so I need to additionally check if it matches the gamma for the texture in the .vrscene file.
Also, the .vrscene format supports using any custom gamma value, which the color-spaces don't.

I guess for both of these, I could fall-back to the Image Map gamma channel.

So, basically I wanted to make sure that the images will have the correct gamma applied when they are rendered in all possible cases.

Greetings,
Vladimir Nedev