Subsurface scattering (sss) with directional light shadows

I'm trying out the new SSS options in the HDRP shader, and it seems like the SSS ignores self shadowing from directional lights causing ears and noses to glow in the shadows. It works as expected with spot lights. Is this a known limitation or am I missing a setting somewhere?

 

The two images you're comparing have very different amounts of light on the figure relative to the overall scene – the directional shot i'm guessing has autoexposure on and is reducing the overall exposure to avoid blowing out the background. You'll want to set the exposure to fixed in your volume profile before comparing lights.

Re: SSS and glowing ears etc, have you checked the thickness on the shader and the scale in your diffusion profile?

 

Hi, thanks for the reply. Exposure was fixed for the screenshots, this is definitely a difference between the direction lights and all the others. I mentioned in my first post that I thought it was an issue with self-shadowing, but even when the character is enclosed in a room with no light source the SSS still glows if the directional light is enabled outside.

The directional light is the only one enabled here, exposure fixed.

I'm using the default HDRP skin diffusion profile so I don't think that will be the issue, but I'll mess with the values and post here if I can fix it.

 

Hi, I have the same problem, what is the workaround or solution?

 

Hi,

I hope that you already solved that issue, but, here is an a workaround which I found.
You could try to use Indirect Light Controller in your Volume and set Indirect Diffuse Lighting Multiplier to 0 (or appropriate value).

Hope, it helps.

With regards,
Yulian