Parameters and tooltips of Volumetrics beta0.9

How precise (approximately) RTR should work. Also have effect on automatic adjustments. Recommended values: 10..50

Volumetric shadows. Both isosurfaces and clouds can cast this type of shadows.

Raytraced shadows; Only Surfaces can cast this type of shadows.

Uniform ambient light. I recommend to use light from above, side and below instead. Currently applied only to surfaces(reason: in reality, ambient lighting of clouds is different from landscape's).

Ambient light coming from above. Currently applied only to surfaces. To use it on MojoWorld terrain and MojoWorld objects, put 'Vol. ambient for MojoWorld' node (Volumetrics category) into MojoWorld's Ambient Light

Ambient light coming from sides. Currently applied only to surfaces. To use it on MojoWorld terrain and MojoWorld objects, put 'Vol. ambient for MojoWorld' node (Volumetrics category) into MojoWorld's Ambient Light

Ambient light coming from below. Currently applied only to surfaces. To use it on MojoWorld terrain and MojoWorld objects, put 'Vol. ambient for MojoWorld' node (Volumetrics category) into MojoWorld's Ambient Light

Ambient light coming from sunlight direction. Currently applied only to surfaces. To use it on MojoWorld terrain and MojoWorld objects, put 'Vol. ambient for MojoWorld' node (Volumetrics category) into MojoWorld's Ambient Light

Ambient light coming from direction opposite to sunlight. Currently applied only to surfaces. To use it on MojoWorld terrain and MojoWorld objects, put 'Vol. ambient for MojoWorld' node (Volumetrics category) into MojoWorld's Ambient Light

How much detailed fractals must be. Default is good enough; if you get something looking smoother than it should, increase this parameter. Values smaller than 1 is not recommended unless you know what you are doing - it may make your terrain to morph noticeably when rendering resolution is changed and/or camera is moved

At what distance details stop decreasing. Smaller values is slower. Default is good enough, practically no need to change

Currently unused.

Works similarly to real photo camera. Bigger values make image brighter, smaller make darker. You can make stars have proper brightness and increase this parameter to make nightside renders

Simulation of photofilm. Usually makes render look more realistic, but somewhat desaturated. Prevents 'over-burning' of render if brightness is too big. It is recommended to turn this on as it helps preserve image for postwork even if render was under/over exposed (bit like HDRI)

Gamma correction. If you feel like, try experimenting with this parameter. Though, it could be better to do gamma correction in postwork

Precision of coloring. Default is good enough, not much need to change. Smaller values is slower, but normally don't give noticeable difference in render quality

If 'Lighting transform method' is set to 'none', defines up to how many meters away from camera shadows will work. If 'Lighting transform method' is set to 'method1', does nothing

Resolution of lighting. For previews, use 500, for final, use ~2000 . Bigger values is better but is also slower and use more RAM

Better set it to method1 unless you're doing animation where camera moves much. It's some internal thing, no explanations(sorry). Maybe I should have blocked it in this release

What maximal precision shadows will have. Smaller values give better quality but are slower and use more RAM. Specified in meters, currently has effect only if 'Lighting transform method' is set to method1.

Maximal lighting error. Smaller values give better quality, but use more RAM.

Raytracing: max. number of ray bounces. You may need bigger values for scenes with lot of multiple reflections

If checked, MojoWorld planet will not be rendered.

If checked, Volumetrics will receive shadows from MojoWorld. That is, shadows cast by MojoWorld objects will be visible ON Isosurfacesand ON Clouds. offtopic: For making shadows cast by Isosurfaces and Clouds be visible ON MojoWorld terrain, open Sunlight Editor, and in Sunlight Color, make function graph with single node 'Vol. shadows ...' (Volumetrics category).You can get more detailed explanation on website.

If unchecked, this thing will not be rendered.

If unchecked, this thing will not cast volumetric shadows.

If unchecked, this thing will not cast raytraced shadows.

Isosurface is contained between lowest altitude and highest altitude. Also have effect on UVposition in functions(UVposition.x is 0 at lowest and 1 at highest; you can use it instead of altitude)

Isosurface is contained between lowest altitude and highest altitude.

Put there texture that controls shape of isosurface. In places where value is below 0 , you'll have solid, where above, you'll have clean air. It's somewhat like effect of temperature on water and ice (where <0 you get ice)

Minimal step size. Default should be good enough

How many refinement steps to do. Default should be good enough

Precision of intersection solver. Default should be good enough

Automatic adjustments. Works only if RTR preview is turned on.

Increase this if you have artifacts. Controls how automatic adjustment works. Have effect on rendertimes (bigger usually slower, but not always).

This parameter is changed automatically if Adaptive is checked and RTR is on.

Experimental parameter. If checked, isosurface will do lighting with submillimeter precision. Slows things down

Color of diffuse component

How shiny you want specular highlight be (bigger values make it more shiny, i.e. smaller spot size)

Color of specular highlight

Glow color

Check it if you want reflections

Check it if you want refractions (doesn't work in this version)

When checked, like in real world, brightness of specular highlight will depend to angle of incoming light and to index of refraction of material (in other words, when it is checked, specular highlights looks less CG-like and can be more realistic)

Index of refraction. Like real world, it has effect on two things: a.) how much light refracts (something that you probably knew already :-), b.) what portion of light goes through and what portion of light reflects off boundary. (somewhat less widely known effect) Some sample values: air or vacuum = 1 , water = 1.33 , ice=1.309 , glass = 1.5 to 1.9 , diamond = 2.42 . To simulate metals, use large values, like 200, so the reflection will be metal-like

Color of reflection (for most kinds of materials (e.g. water, glass, polished rock, etc.) use white)

Color of refraction (for most kinds of materials (e.g. water, glass, polished rock, etc.) use white)

If unchecked, this thing will not be rendered.

Atmosphere is contained between lowest altitude and highest altitude. These parameters also have effect on UVposition in function graphs (UVposition.x is 0 at lowest and 1 at highest; you can use it instead of altitude) so height of cloud layer can be specified with only lowest and highest alt.

Atmosphere is contained between lowest altitude and highest altitude.

Controls density of the clouds. Internally, density is clamped to 0..1 range. To control overall density, use 'Visibility distance' instead

Defines what color of light is trapped(scattered or absorbed) the most. For example, if extinction is greenish blue, after light passes through much atmosphere you will get red because green and blue was either scattered or absorbed Reemission(parameter right below) defines how much of this light is scattered (rest is absorbed). i.e. If extinction is blue and reemission is white, it blue light is scattered the most. If reemission is black, blue light is absorbed the most

Defines what part of trapped light is scattered (rest is absorbed). You can think of it as color of dust particles. See tooltip for extinction.

Somewhat like glow; defines how much light is produced by cloud. Can also be used for ambient lighting.

Defines how much effect absorbing and scattering have on lighting (shadowing). Example: 0 = no effect on lighting (no shadows), 0.5 = half effect, 1 = full effect

Anisotropic scattering. Rayleigh simulates scattering by molecules(e.g. scattering by very clean air), others simulate scattering by fog/dust particles.

Sort of visibility distance, specified in meters. Smaller values make denser atmosphere.

Minimal step size. Have effect on render times. Good starting value: 1/15 of 'Free path length' (parameter right above this one).

Automatic adjustments. Works only if RTR preview is turned on.

Increase this if you have artifacts. Controls how automatic adjustment works. Have effect on rendertimes (bigger usually slower, but not always).

This parameter is changed automatically if Adaptive is checked.

Obsolete.

Jittering amount. Use values between 0 and 1, recommended value:0.7 for air atmospheres, 0.3 for clouds. Have effect on image quality, sorta 'color bands versus noise'.