I have a plane with displacement to make waves. It has particles for grass. I added it to a collection instance. I mirrored it. After mirroring, the grass only show on the original. If I apply the mirror the grass shows on the other as well.
If I create a new collection instance the displacement meshes with the rest fo the model, but once the mirror is applied, the displacement on all the planes don't match up anymore. There's gaps between the planes.
I thought using collection instances might be more efficient, but maybe I should just make mirrors and duplicate?