I need someone to make terrain something like minecraft (NOTE:terrain should not be blocky) I gave minecraft as an example because the terrain randomly generates as the player walks,with trees,plants,caves,and ravines.
The terrain should be:
-realistic
-have things like caves,and typical underwater structures
-plants, corals and rocks
Hi, look at game engines such as CryEngine, Unity, Unreal Engine and the necessary 3D models, textures and sounds. This all does not fit into your budget. In this game need to spend a lot of time and effort to develop. Better to look at games such as Rust or The Forest.