Resolved Subsurface Scattering shader

Hello! I have a problem. I found the SSS code, but it doesn't work as Filament shows. What's wrong?
https://github.com/google/filament/...84d65/shaders/src/shading_model_subsurface.fs

Code (CSharp):

1. void SubSurfaceScattering_half(
2. real3 Albedo,
3. half3 mainLightColor,
4. half3 mainLightDir,
5. real3 ViewDirWS,
6. real3 NormalWS,
7. half3 SubsurfaceColor,
8. half Thickness,
9. half SubsurfacePower,
10. out real3 Out)
11. {
12.     ViewDirWS = normalize(ViewDirWS);
13.     Thickness = saturate(Thickness);
14.     half NdotL = saturate(dot(NormalWS, mainLightDir));
15.  
16.     real scatterVoH = saturate(dot(ViewDirWS, -mainLightDir));
17.     real forwardScatter = exp2(scatterVoH * SubsurfacePower - SubsurfacePower);
18.     real backScatter = saturate(NdotL * Thickness + (1.0h - Thickness)) * 0.5h;
19.     real subsurface = lerp(backScatter, 1.0h, forwardScatter) * (1.0h - Thickness);
20.  
21.     Out = Albedo + SubsurfaceColor * (subsurface * 0.3184h);
22. }