here is a python code modify it that there is a 3d perslin noise genererator. 


from ursina import *
from ursina.prefabs.first_person_controller import FirstPersonController

app = Ursina()

# Define a Voxel class.
# By setting the parent to scene and the model to 'cube' it becomes a 3d button.

class Voxel(Button):
    def __init__(self, position=(0,0,0)):
        super().__init__(parent=scene,
            position=position,
            model='cube',
            origin_y=.5,
            texture='white_cube',
            color=color.color(0, 0, random.uniform(.5, 1.0)),
            highlight_color=color.lime,
        )

# Generate the world
for z in range(20): # Depth
    for x in range(20): # Width
        # Generate height
        height = random.randint(1, 5)  
        for y in range(height): 
            voxel = Voxel(position=(x,y,z))

def input(key):
    if key == 'left mouse down':
        hit_info = raycast(camera.world_position, camera.forward, distance=5)
        if hit_info.hit:
            Voxel(position=hit_info.entity.position + hit_info.normal)
    if key == 'right mouse down' and mouse.hovered_entity:
        destroy(mouse.hovered_entity)


player = FirstPersonController()
app.run()

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