By default, TerraPOV uses an assumed_gamma value of 1. However, this 
messes up the rest of my scene. What adjustments do I need to make to 
the media to make it look right with the default gamma value for 3.61?

-Mike

Post a reply to this message

SharkD wrote:
> By default, TerraPOV uses an assumed_gamma value of 1. However, this 
> messes up the rest of my scene. What adjustments do I need to make to 
> the media to make it look right with the default gamma value for 3.61?
> 

You'll have to adjust *your* scene to work in linear color space (i.e. 
gamma 1.0) as gamma correction does not only change brightness, it 
changes also the hue and TerraPOV (or e.g. lightsys) will only work in 
linear color space (also default for POV-Ray 3.7) as expected.

-Ive

Post a reply to this message

Ive wrote:
> You'll have to adjust *your* scene to work in linear color space (i.e. 
> gamma 1.0) as gamma correction does not only change brightness, it 
> changes also the hue and TerraPOV (or e.g. lightsys) will only work in 
> linear color space (also default for POV-Ray 3.7) as expected.
> 
> -Ive

Any tips on how to go about doing this? The renders always end up 
looking too bright and washed out.

-Mike

Post a reply to this message

SharkD schrieb:
> Any tips on how to go about doing this? The renders always end up 
> looking too bright and washed out.

Does TerraPOV use images for texturing? If so, try converting them to 
PNG. (Make sure the converter writes a gAMA chunk; from my experience, I 
can recommend IC for this job.)

Post a reply to this message

clipka wrote:
> Does TerraPOV use images for texturing? If so, try converting them to 
> PNG. (Make sure the converter writes a gAMA chunk; from my experience, I 
> can recommend IC for this job.)

Actually, the only part of TerraPOV I used is the atmospheric media 
described in the tutorials newsgroup. Everything else was created 
separately.

-Mike

Post a reply to this message