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General => Terragen Discussion => Topic started by: paq on April 14, 2013, 06:59:32 PM

Title: How reduce tiny clouds in this image ?
Post by: paq on April 14, 2013, 06:59:32 PM
Hello,

This is probably a very basic question, but anyone would be kind enough to tell me which parameters I have to tweak to get rid of this really small cloud formation ?

(http://paqwak.com/wp-content/uploads/2013/04/SmallClouds.jpg)

I have the feeling the Buoyancy and clumping in the Tweak Noise tab should help, but I dont really understand how it works.

Thanks a lot.

Title: Re: How reduce tiny clouds in this image ?
Post by: Dune on April 15, 2013, 02:39:35 AM
The 'cloud guys' will come in with a more elaborate answer, I expect. All I can say that a minus number in the noise variation will be of help. Adding a color adjust and sliding the black up a bit may also reduce small clouds a bit, as well as the coverage gamma in the cloud tabs.
Title: Re: How reduce tiny clouds in this image ?
Post by: Tangled-Universe on April 15, 2013, 03:24:56 AM
These small clouds are a b*tch indeed...

A negative noise variation is a possibility, although you can also achieve good results with a positive value.
As usual there are a multitude of ways of doing something :)

Some other pointers:

1)
Contrast @ ~1
Roughness @ ~1.25

if
Contrast @ >1
then
Roughness @ < ~1.25

Small increments of 0.1 - 0.25 advised.

2)

Attach a "colour adjust shader" to the output of your cloud fractal.
Raise black colour from 0 to 0.05 or 0.1
Raise white colour with same value.
This removes tiny speckles around your fractal.
Also lowering gamma may help greatly.

3)

Lower cloud gamma coverage in cloud node
Title: Re: How reduce tiny clouds in this image ?
Post by: paq on April 15, 2013, 09:05:47 AM
The contrast / roughness rule works really well !
I'll try the other tips too :)

Thank you some much !