Quote from: cyphyr on June 04, 2007, 06:22:56 AM
Thanks for the colour adjust shader tip. I'm rendering off another version with the 3 cloud masks at the moment at stupid settings. I'll try the colour adjust setup when its finished. A couple of quick tests I tried with it produced somewhat "flat" results. I could imagine that a combination of maybe 9 cloud layers (stacked very close together) with 3 image masks all controlled by multiple colour adjust shaders could produce a cloud scape almost indistinguishable from reality.
Richard
I made a couple of quickly masked images and while the theory is good the practise is a little harder. I have a render running at home although somewhere along the way I screwed up some of the settings. Luckily I "made a backup" in a previous post
I'll start from there again.
If you or anyone else wants to play as well I've uploaded my set of masks
<
http://www.path.unimelb.edu.au/~bernardk/tgdemo/katrina_greyscale.exe> 37Mb self extracting RAR
Contains the raw greyscale mask and three masked versions with 2 particle size ranges and the remaining image.. It may also help to restrict clouds to the mask by plugging the colour adjust shader into an intermediate surface shader: (black, coverage 0.5, fractal breakup 1, colour adjust connected to child layer and fractal breakup)... and then into the cloud fractal's blending shader.
The lowest cloud layer has a coverage adjust >0 so it will partly extend across the entire render (adds a bit of haze to the atmosphere). This is OK in this case, but having this duplicated could be detrimental. I'd set it to 0 for the other 2 layers.