SSS Transmission visual bug

[KylerBessert]

Godot version

4.0 RC5

System information

Windows 11, Vulkan

Issue description

When using transmission but going above the max value to get the desired results I end up having visual problems with the material.

Skin Without SSS;

Skin With SSS;

Visual Issues:

This is not a custom mesh problem, using the default sphere it has this bright visual issue as well;

This seems to be on the other side of the sun/light source that ends up having this issue.

Steps to reproduce

1. Create a new scene
2. Create a new instanced mesh and assign a new material to it
3. Set up the material SSS like so;
   

Minimal reproduction project

N/A

[clayjohn]

I'm not sure that a transmittance depth of 500 is a reasonable value. The defined range in the editor is 0.001 to 8. When you go that far outside of the reasonable range I think you have to expect some problems to occur. On our end, the way of "fixing" this type of bug is to clamp the range so you cannot type in a value greater than 8, would that be preferable for you?

[KylerBessert]

I am not sure how to go forward if it is clamped at 8 since if you have something up higher like 100-500 you get transmission to bleed through a lot more like so ;

But if you have it clamped to 8 you get nearly 0 bleeding effect which is used for cartoony skin, and candle wax, etc.

[KylerBessert]

But in all honesty I feel the best approach is to clamp it to 8 since anything over it starting at about 30 you get these artifacts. @clayjohn thanks for the quick response on this. Since this is based on a universal material that should suit most needs, I feel that my need is more custom and I will go that route with it.