Christoph Hormann wrote:

> The snow is indeed the weak point - i played with the idea of a 
> subsurface scattering version but this scene is not fast enough and the 
> geometry is not that good to show the scattering anyway.

   Well, SSS will have made it a christmas card for next year... :)

> The problem i have with the skylight macro is that it does not offer 
> much control over the colors.  I used a different light color for the 
> sky than for the light source to have more freedom in that part.

   By "not much control" you mean really "no control at all", isn't? I 
think this is a "feature", the main feature for a sky model, IMHO: I 
don't have to think on the colors. Of course, you can always ignore 
SunColor and use whatever you want for a concrete artistic effect. I 
tried for example using a blackbody between 2000 and 6500 K, depending 
on the altitude, and it also works nicely.

> Another thing is of course that the use of a mesh for the sky is 
> certainly not the best solution - although it is of course the only 
> viable one with standard POV. A feature to have image_maps based on an 
> internal array (or an ascii hdr file format) would be useful for this.

   Yes, the mesh is a bit slow to generate when you need great detail on 
the sky, to avoid seing the triangles. I hope Phillipe will have the 
time this year to add the save/load feature for the mesh.

   Regards..


--
Jaime

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Jaime Vives Piqueres wrote:
> 
>   By "not much control" you mean really "no control at all", isn't? I 
> think this is a "feature", the main feature for a sky model, IMHO: I 
> don't have to think on the colors. Of course, you can always ignore 
> SunColor and use whatever you want for a concrete artistic effect. I 
> tried for example using a blackbody between 2000 and 6500 K, depending 
> on the altitude, and it also works nicely.

You have quite a bit of control over the sky appearance with the 
Current_Turbidity and Intensity_Mult parameters.  But still it is 
somewhat limited - there is no difference made between dust turbidity 
and fog turbidity for example.  I agree that it's a nice thing to have a 
light setup you can use without thinking and that works reasonably well 
then but for a scene that needs a lot of work otherwise you usually want 
to have more control on the sky as well.

Christoph

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