>> Why not? If you've set display_gamma to 1.0 then both color 0.5 and
>> display_color 0.5 will give 50% brightness.
>
> If display_gamma is 1.0, then no output gamma correction would occur and 
> it
> would give an output pixel of 128,128,128, which is for 2.2 gamma only 
> about
> ~21% brightness.

Oh OK, I was assuming that you would set display_gamma correctly for 
whatever device you wanted to "view" the output on.  Of course if you set 
that incorrectly then everything is going to be screwed up, including 
shadows, diffuse lighting etc let alone the colours.

> I think this or 3.  If your are using images from the web, their gamma may 
> not
> be the same as your monitor gamma.

Oh I didn't realise that colours on the web had gamma, I thought that 
255,128,64 would display the same no matter if it was in HTML color 
statement or png file or jpeg file etc.  IIRC everything on the web is 
designed for use in sRGB color space, so gamma of 2.2?

All I'm thinking is that I know lots of places have certain RGB colour 
values that are assigned for brand colours etc or just used in web sites for 
the "core colours".  These are presumably designed with gamma 2.2 in mind, 
it would just be nice to use those RGB values (and any images already made 
that contain them) directly in POV without any tricks.

Post a reply to this message