Noctilucent clouds

[FrankThomas]

What the hell are they I hear you ask ?

http://en.wikipedia.org/wiki/Noctilucent_clouds

Is what they are.  I'm wondering if something similar could be done in T2TP, maybe with some high altitude clouds and setting the luminosity.  I'm going to give it a try and see what I come up with but feel free to have a play

[Will]

I would try with large, flat, high altudute clouds 


Regards,

Will

[3DGuy]

Seems possible. Quick try:
Default cirrus layer, adjusted the altitude to 100000 meters. Put the sun directly ahead with an elevation of -10 (i.e. well below the horizon). This must mean this cloudlayer is lit from below.

[FrankThomas]

Well, this is what I've come up with so far.  Clouds at about 38,000m with a bit of a blue tint to them

[Will]

Nice, Well its time I retire Mid-terms tomorrow and 100 posts in three days...whew I need a brake. Good Night to all of you 


Best Regards,

Will

[gradient]

Here is my quick attempt at this cloud formation....Remember noctilucent clouds are only seen once the sun is below the horizon....so, the terrain would not have much light on it.  Here the sun is at -7 degrees....

[gradient]

Here's my second crack at these....some tweaks to the lighting.....

[FrankThomas]

I was actually surprised the mountain was as illuminated as it was - I had the sun alt set to about -3 deg but the mountain is quite high.  I'll see if I can have another go tonight when I get in from work. 

Nice going so far

[FrankB]

You may also put a cloud layer ABOVE the atmosphere. This way, the cloud is not as much affected by the atmospheric density, darkening etc....

Frank

[Will]

Its looking good so far gradient

Regards,

Will

[Oshyan]

Try increasing Ambient Light under the Tweaks tab in the cloud node. Not a realistic simulation perhaps, but easier to achieve the effect.

- Oshyan