Thanks for the answers so far

The thing that would be the best would probably be the Isometric camera, however i have tried that over and over and I cannot get it to work, I have set the flag but everything stays the same, am I missing a step?
(I tested it by changing the sprites Z and moving the camera, the flag doesn't make a difference for me)

I tried the "d3d_entsort" and none of the options seems to work either, setting it to 0 (not sorting at all) works in this case, but the moving sprites always go on top and that would mean that the player always walks "on" the trees and not under them.

I am not sure how materials work yet but I will research into it, too