#Atmosphere
4 messages in this thread
Hello, I am trying to construct a planet surrounded by an atmosphere.
I've constructed two spheres, one larger than the other, where the larger
sphere is the atmosphere sourrounding the planet. The atmosphere is a pale
blue hue, on a black star background. The atmosphere needs to get thinner as it
moves away from the surface of the planet. I need the blue to blend right in
with the black background as it thins out. I've used the transparency settings
to do the astmosphere, and trasparency falloff to increase the transparency of
the larger sphere around the
edges. The problem is that I can't seem to get the edges of the sphere
transparent enough to blend into the black background, so the atmosphere
dosen't look very convincing. Any Ideas how I can achieve this blend?
Thanks!
Jeff
Jeff,
you could use an opacity map. Create it with animator pro, or a similar paint
package, using a grayscale pallette and rgrad (radial gradient) ink. It would
be need to be a solid white circle on a black background with a gradient of
white to black around the outer edge. You could map this planar to the
atmosphere sphere object. It may only work if you stay at the same camera angle
to the atmosphere. If you go around the planet you might have a problem and I
can't think of a solution for that other than post-processing a haze in video
post, or similar technique.
Unfortunately, I do need to travel around the planet about a quarter
of a rotation. I suppose maybe I could rotate the outer sphere
(atmosphere) in conjuction with the camera.
Thanks for the help!
Jeff
Jeff,
glad to help. Maybe rotating the outer sphere to face the camera would work.
You'd need to render it to see.