Why is my Megascans Quixel Grass to birght?

Development Rendering
1

Hi Guys,

you can see in the Screenshot that the Clover Foliage looks right but the Grass is to bright.
I just used the Megascans Meadow Pack.

Some Ideas?
Thx a lot

2

Thx for the quik answer. Even if I turn down the light its way to birght/white, looks totally off. I added now a Multi + 3Vec to turn the Diffuse/SSS down, but I dont think this sould be the right solution?

3

Standard Scene setup (Light Source / SkyLight / SkySphere / AtmosphericFog)
The Grass in the BG is even worse.