3DGS is not a powerful Engine like Unity but its powerful enough to handle Models with an Poly Count over 1000... *psst* btw, theres a secret feature in 3DGS... its called LOD...
cYa Sebastian
Tutorials: [Blender]Terrain creation ENG/GER [Blender]Low Poly Tree Modeling [GIMP]Create a Texture for Terrains CLICK HERE