bEnableImprovedSnow=0

bEnableImprovedSnow=1 (Default)

bEnableProjecteUVDiffuseNormals=0

bEnableProjecteUVDiffuseNormals=1 (Default)

bEnableProjecteUVDiffuseNormalsOnCubemap=0 (Default)
I haven't found out if this setting does anything yet.
fProjectedUVDiffuseNormalTilingScale=0.2000
fProjectedUVNormalDetailTilingScale=0.8000

fProjectedUVDiffuseNormalTilingScale=1
fProjectedUVNormalDetailTilingScale=1

The following settings all require bEnableImprovedSnow=1
Snow Mask
bEnableSnowMask=1 (Default)

bEnableSnowMask=0

Snow Sparkles
bToggleSparkles=0

bToggleSparkles=1 (Default)

The following snow sparkle settings require bToggleSparkles=1
fSparklesSize=140

fSparklesSize=2

fSparklesIntensity=1 (Default)

fSparklesIntensity=0.5 (sorry about the rim lighting)

fSparklesDensity=0.85

fSparklesDensity=0.1 (Don't do this lol)

fSparklesMaxDistance=1000 (Default)
I haven't found out if this setting does anything yet.
fSparklesSpecularPower=2 (Default)
I haven't found out if this setting does anything yet.
fSpecularSparklesIntensity=1 (Default)
I haven't found out if this setting does anything yet.
iSnowSparklesColor=2 (Default)
fSnowSparklesColorR=1 (Default)
fSnowSparklesColorG=1 (Default)
fSnowSparklesColorB=1 (Default)
Setting iSnowSparklesColor to 0, 1, and 2 are preset colors for sparkles. 2 is the best looking IMHO. A value of 3 can be used in combination with fSnowSparklesColorR, fSnowSparklesColorG, and fSnowSparklesColorB to create a custom color. Please note that this isn't any color, as it is restricted to bright colors, and this is merely imposing the amount of red, green, and blue on top of the snow color. Black is not possible, for instance.
Snow Rim Lighting
bEnableSnowRimLighting=0

bEnableSnowRimLighting=1 (Default)

The following settings all require bEnableSnowRimLighting=1
fSnowRimLightIntensity=0.3 (Default)

fSnowRimLightIntensity=0.1

fSnowGeometrySpecPower=3 (Default)

fSnowGeometrySpecPower=10

fSnowNormalSpecPower=2 (Default)

fSnowNormalSpecPower=10

iSnowSSSCurrentColor=2 (Default)
fSnowSSSColorB=0.08 (Default)
fSnowSSSColorG=0 (Default)
fSnowSSSColorR=0 (Default)
Changing iSnowSSSCurrentColor alters the color of something to do with snow rim lighting (I can't find the words). A setting of 3 in combination with fSnowSSSColorR, fSnowSSSColorG, fSnowSSSColorB set a custom color.
fSnowSSSDepthDiff
I haven't found out if this setting does anything yet.
fSnowSSSStrength
I haven't found out if this setting does anything yet.
Disable Ambient Occlusion on Snow
By default, ambient occlusion is disabled on snow when the improved snow shader is enabled. This setting only works when using the improved snow shader.
bDeactivateAOOnSnow=1 (Default)

bDeactivateAOOnSnow=0

Edited by DoubleYou, 17 May 2020 - 09:48 AM.
Updated info