POV-Ray [plugin] (updated: 2016/Aug/08)

[micheus]

The first one.
In currently My Wing3D's Camera settings is...
Field of view is 45.00022

PovRay Camera Angle = Field of view

But,In other hand,exported .Pov file by PovRay Plugin is here
The camera angle is 57.822402 degree

You can see the origin of this difference in the way it is computed by the plugin (I didn't changed that): here
It makes the adjust based in the width x height you define. So, maybe if you use the new camera preset - Viewport - you probably will get a closer value.

You can get more information about camera parameters used by POV-Ray in this link.

The Second one.
If the value set by purposely,I suggest that it is an appropriately information should be feedback to User through the user-interface.
Only grayed-outed slider cause a risk of being misunderstood to the User.
Because currently, the gray-out input box display still remain different value(180) than actual exported result.

I had thought about to hide it for these options and now I'm sure that it's the best option.

About Gamma.
Thanks for advice,a pointer for a comment and links.
Recent PC and Mac takes the same Gamma value, isn't it?

I cannot answer that.