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Why does Daz documentation hate units?

Jack of SpadesJack of Spades Posts: 80
edited January 2018 in Daz Studio Discussion

"SSS Amount - This property sets how much scattering is occurring" Well, duh. Compared to what? Values above 1 seem to be possible.

"Scattering Measurement Distance - This is the distance light must pass through an object before getting the SSS Amount." In miliparsecs? Centimeters? Furlongs? 

I'm trying to convert DAZ shaders to Cycles, but the lack of precision in the documentation on the UberShader is killing me.

Post edited by Jack of Spades on

Comments

  • LeanaLeana Posts: 11,821

    all distances in DS are in cm.

  • jag11jag11 Posts: 885

    Geometries in DS are specified in cm, but Iray works with meters, you can confirm this by creating a 1m sphere and 10cm sphere, apply both the Iray Wax shader, the 1m sphere looks more like wax than the 10cm sphere.

    For surfaces, measures units do not matter, but for scattering and lights are extremely important.

  • Richard HaseltineRichard Haseltine Posts: 102,419

    The shader proeprties should be converted to cm, though that may not be the case for some of the samples I suppose.

  • Jack of SpadesJack of Spades Posts: 80

    Any clue on SSS Amount?

  • j cadej cade Posts: 2,310
    Jack of Spades said:

    Any clue on SSS Amount?

    *Pretty sure* SSS Amount simply doesn't have a unit but is a variable. As such, instead the 0 to 1 represents completely transparent (0) to fully opaque *at the distance specified by scattering distance* (1)

    (So if you put a value of 2 into SSS Amount it would be fully opaque at half the value of the distance specified by scattering distance. )

    There's more to it than what I'm saying, obviously, but it works as a pretty good rule of thumb
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