Hi George,
No good for a planetary or low orbital POV but for ground level ... maybe.
Images at
http://www.neico.co.nz/3d/RSPancakes.html
Lower image is simply with the materials boxes moved ... the "dirt" and
"white-dirt" . Most of the lighting nonsense is just my way of doing quick
skies these days.
Point is that at this POV you dont need shadows to tie into clouds ... this
is never visible to a human on the ground.
Neil Cooke
----- Original Message -----
From: "George Jenner" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Sunday, February 19, 2006 12:36 AM
Subject: Cloud shadows on a landscape
Greetings
Well after the success of last weekend's ploughing I thought you needed
another challenge :-)
I have a sky coloured using Tim Borgmann's VSL cloud from Realsoft
downloads. Now I want to use the same material to put shadows of clouds
on the landscape.
It's easy to make a slide projector using a bitmap (it's in the manual -
light properties, illumination = texture (map coords - parallel map to a
distant light), but I can't seem to get anywhere using a procedural
shader.
So what are my options? Render the sky to a bitmap and use that? I'd
rather use the sky material to easily change the density of clouds in the
sky and shadows at the same time.
I thought of making a "mask" to put in front of the light, but how do you
do that for a distant light? Doesn't make sense for a light that is
infinitely wide. Neither does mapping a bitmap to it, for that matter.
And ideas? This must have been done before. If anyone remembers links
I'd be mucho grateful.
Thanks. But now I have to go thermally morph some disk projections of
lactofarinacious colloid for lunch. (pancake time)
George
