Loading...
> >

Scatter vs. Scatter and Transmit

Oso3DOso3D Posts: 15,085
in The Commons

Can someone explain this in more detail? What is the difference? Why use one vs. the other?

 

Comments

  • FishtalesFishtales Posts: 6,212

    This is probably way out .......... but.......

    Scatter scatters the light within the volume and decreases as it passes through.

    Scatter and Transmit scatters the light but transmits a colour back to the surface which is seen by the eye/camera.

  • Richard HaseltineRichard Haseltine Posts: 108,000

    http://docs.daz3d.com/doku.php/public/software/dazstudio/4/referenceguide/interface/panes/surfaces/shaders/iray_uber_shader/shader_general_concepts/start#base_color_effect

  • nicsttnicstt Posts: 11,715

    Scatter and Transmit tends to increase render times for IRAY, but I usually convert figures that dont have to it; although it can requires different textures than included.

  • Oso3DOso3D Posts: 15,085

    Richard: Thank you, I'm aware of the documentation. The problem with the documentation is that it doesn't really explain what any of that means, or why one might want to use one over the other, or what each is good for, or ... anything.

    'the remainder is sent to the Transmission layer instead of absorbed.' ... and I go 'uh, wut?'

    Looking for more of a high level assessment and advice with it and what it actually effectively means.

     

  • Richard HaseltineRichard Haseltine Posts: 108,000

    Some light is scattered, controlled by the parameters. If it's plain Scatter then that is all that you see, any light that wasn't scatterd is just dropped - if it's Scatter and Transmit then the light left from Scattering is Transmitted, again subject to parameters.

  • vwranglervwrangler Posts: 4,971
    edited April 2016

    As I understand it: with Scatter Only, very little of the light/color of the Transmission/Translucency settings is passed through so you can see much effect from it. What you see primariliy is the Diffuse texture with a bit of tint from what ever Scatter Only lets through.

    With Scatter And Transmit, a lot more of the color from Transmission/Translucency comes through the diffuse, and you can see its effect much more strongly.

    As an experiment, if you have Darren G3M (or, really, any dark skinned character will probably do, but I saw this happen with Darren), render him once with his skin surfaces on Scatter Only, then another time with Scatter And Transmit. He will be much much MUCH darker with the latter setting, because his transmission color is fairly dark.

    Post edited by vwrangler on
  • nonesuch00nonesuch00 Posts: 18,723
    timmins.william said:

    Richard: Thank you, I'm aware of the documentation. The problem with the documentation is that it doesn't really explain what any of that means, or why one might want to use one over the other, or what each is good for, or ... anything.

    'the remainder is sent to the Transmission layer instead of absorbed.' ... and I go 'uh, wut?'

    Looking for more of a high level assessment and advice with it and what it actually effectively means.

     

    Scatter and Transmit would be for things like fireflies and plankton and such I think. And also maybe materials like glow-in-the-dark plastics and paint and watch dials.

  • FishtalesFishtales Posts: 6,212

    I have used Scatter and Transmit for water too.

Sign In or Register to comment.