Some examples of atmospheric tweaking.
Pretty much everything on this dialog is self explanatory (or explained on the dialog itself). Only those items which aren't will be explained here.
Density/Decay. A larger value for any of the elements will increase the effect of that element.
Lock Colour with Atmospheric Blue (Light Decay). In most situations, the Atmospheric Blue and Light Decay colours should complement each other, and setting this checkbox will result in values which will suit each other well to give Earth-like atmospheres.
Edit Colour. You should not have to change the various colours unless you want specific "unusual" effects. The defaults work pretty well for most earthbound scenes.
Half-height. The densities of the atmospheric components decrease as altitude increases. Half-heights specify the heights at which the atmospheric components are half as dense as they are at an altitude of zero. Lowering these "flattens" the atmosphere. For example, a low Half-height for Simple Haze can be used to create mist-filled valleys. By lowering Half-heights and increasing the corresponding Density/Decay works well for increasing the "scale" of the scene.
"Half-height is analogous to half-life relating to radioactive decay etc. Each of TG's atmosphere components drops in density exponentially, and the lower the half-height, the quicker the density changes with height. At an altitude of 0, the half-height has no effect. But if the half-height is, say, 10, then at an altitude of 10 the density is only half of what it was at 0, and at an alt. of 20 it's halved again, and so on. This also means that at -10, the density has doubled, and at -20 it's quadrupled.
"To get a low lying mist layer, you'd set the Half Height of the Simple Haze to something between 2 and 10. One of the things that isn't very clear with this system is how to raise or lower the layer. Because it's an exponential, to raise the 'level' of the mist you would increase the Density, and decreasing the Density has the effect of 'lowering' the mist, although in fact, there is no such thing as the actual level of the mist. It's best to judge it visually."
Matt Fairclough
Some examples of atmospheric tweaking.
![]() render controls |
![]() landscape |
![]() water |
![]() clouds |
![]() atmosphere |
![]() lighting |
![]() image |
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