HDRP - Normals in shadow areas looks inverted

[Spy-Shifty_1]

Hi there,

we are using the latest version of HDRP (7.1.2) with Unity 2019.3.0b10
And we’ve encountered some weird behaviour with our lighting / normal map.

As you can see, in the right part of the image, where the sun shines on the model, the light calculation is correct. On the left side, where the shadow is, the light comes from below.

I believe it has something todo with the indirect light.
I use almost the default scene setup of HDRP. I have just added the HDRI to the scene.

In Quixel the lighting looks good

As well in unity without scenelights

Can anyone help us?

[neoshaman]

It’s the light that bounce from teh ground

[Grimreaper358]

Yes, it’s the ground of the HDRI.

You would need to use an HDRI with a darker ground or one with black as the ground. YOu can also use the Physically Based Sky and set the ground color to black or close to black.

[Spy-Shifty_1]

Thanks, I thought so.