Re: Same Grass Problem

What we're seeing there are shadows cast from the ground geometry onto the grass.

The Shadow properties under the Illumination tab of the hair material can be adjusted to reduce this.

Shadow Density will affect all shadows, including self shadows, so that likely won't be the best option.

Reducing the Received Shadow will make the shadow the ground casts less intense, but it will also affect the shadows cast by any other objects so that might also not work.

Lowering the Back Shadow is probably your best option.

Darby Edelen