Cant apply different textures for each face of the cube using ursina engine

[DrFHMNBU]

This is the function used to generate the cubes:

def g(x,y,z):
    cube = Entity()
    sides_face = Entity(parent=cube, model='cube', texture='grass_side', position=(x+0, y+0, z+0), scale=(1,1,1))
    top_face = Entity(parent=cube, model='cube', texture='grass', position=(x+0, y+0.5, z+0), scale=(1,0.01,1))
    bottom_face = Entity(parent=cube, model='cube', texture='dirt', position=(x+0, y-0.5, z+0), scale=(1,0.01,1))

But with transforming into it crashes:

def g(x,y,z):
    cube = Entity(parent=cube, model='cube', texture='grass_side', position=(x+0, y+0, z+0), scale=(1,1,1))
    cube.texture_top='grass'
    cube.texture_bottom='dirt'

This is the error log:

PS F:\xamppZ4\main v2\htdocs\python\games\mc\python-mc-clone-5> python3 .\pruebamc50.pyw
:prc(warning): Invalid integer value for ConfigVariable win-size: 819.2000122070312
:prc(warning): Invalid integer value for ConfigVariable win-size: 1024.0
Known pipe types:
  wglGraphicsPipe
(3 aux display modules not yet loaded.)
set window position: Vec2(128, 102.5)
:prc(warning): changing default value for ConfigVariable paste-emit-keystrokes from '1' to '0'.
:pnmimage:png(warning): iCCP: known incorrect sRGB profile
package_folder: C:\Users\usuario\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\ursina
asset_folder: .
Traceback (most recent call last):
  File "F:\xamppZ4\main v2\htdocs\python\games\mc\python-mc-clone-5\pruebamc50.pyw", line 11, in <module>
    window.options_panel.enabled = False
AttributeError: 'Window' object has no attribute 'options_panel'
PS F:\xamppZ4\main v2\htdocs\python\games\mc\python-mc-clone-5> python3 .\pruebamc50.pyw
:prc(warning): Invalid integer value for ConfigVariable win-size: 819.2000122070312
:prc(warning): Invalid integer value for ConfigVariable win-size: 1024.0
Known pipe types:
  wglGraphicsPipe
(3 aux display modules not yet loaded.)
set window position: Vec2(128, 102.5)
:prc(warning): changing default value for ConfigVariable paste-emit-keystrokes from '1' to '0'.
:pnmimage:png(warning): iCCP: known incorrect sRGB profile
package_folder: C:\Users\usuario\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\ursina
asset_folder: .
Traceback (most recent call last):
  File "F:\xamppZ4\main v2\htdocs\python\games\mc\python-mc-clone-5\pruebamc50.pyw", line 19, in <module>
    g(i,0,k)
  File "F:\xamppZ4\main v2\htdocs\python\games\mc\python-mc-clone-5\pruebamc50.pyw", line 13, in g
    cube = Entity(parent=cube, model='cube', texture='grass_side', position=(x+0, y+0, z+0), scale=(1,1,1))
UnboundLocalError: local variable 'cube' referenced before assignment

I want to render 6 materials for each face of the cube, so... any solution? Thanks anyway.

[a2cy]

the error youre getting is because youre trying to parent te cube to itself. if you want to use multiple textures on one Entity you have to create a texture atlas or use a texture array

[DrFHMNBU]

This is the atlas: But I have this code:

from ursina import *
import math

app = Ursina()

window.borderless = False
window.exit_button.visible = False
window.fps_counter.enabled = False
window.entity_counter.enabled = False
window.collider_counter.enabled = False

def g(x,y,z):
    cube = Entity(model='cube', texture='dirt', position=(x, y, z), scale=(1,3,1))
    cube = Entity(parent='cube', model='cube', texture='grass_side', position=(x, y + 1, z), scale=(1.01,1,1.01))
    cube = Entity(parent='cube', model='cube', texture='grass', position=(x, y + 1, z), scale=(1,1.01,1))

def getSurface(i,k):
    return int((sin(i/5)+cos(k/5))*5)+int((sin(i/25)+cos(k/25))*25)-50

for i in range(20):
    for k in range(20):
        surface=getSurface(i,k)
        g(i,surface,k)

walkspeed=4
rotspeed=90
mouse_sensitivity = Vec2(20, 20)

window.color = color.rgb(0,127,255)

def update():
    if held_keys['space'] and mouse.locked == True and mouse.visible == False:
        camera.position += (0, time.dt*walkspeed, 0)
    if held_keys['x'] and mouse.locked == True and mouse.visible == False:
        camera.position += (0,-time.dt*walkspeed, 0) 
    if held_keys['w'] and mouse.locked == True and mouse.visible == False:
        camera.position += (math.sin(math.radians(camera.rotation_y)) * time.dt * walkspeed, 0, math.cos(math.radians(camera.rotation_y)) * time.dt * walkspeed)
    if held_keys['s'] and mouse.locked == True and mouse.visible == False:
        camera.position -= (math.sin(math.radians(camera.rotation_y)) * time.dt * walkspeed, 0, math.cos(math.radians(camera.rotation_y)) * time.dt * walkspeed)
    if held_keys['a'] and mouse.locked == True and mouse.visible == False:
        camera.position -= (math.cos(math.radians(camera.rotation_y)) * time.dt * walkspeed, 0, -math.sin(math.radians(camera.rotation_y)) * time.dt * walkspeed)
    if held_keys['d'] and mouse.locked == True and mouse.visible == False:
        camera.position += (math.cos(math.radians(camera.rotation_y)) * time.dt * walkspeed, 0, -math.sin(math.radians(camera.rotation_y)) * time.dt * walkspeed)
    if mouse.left:
        mouse.locked = True
        mouse.visible = False
    if held_keys['escape']:
        mouse.locked = False
        mouse.visible = True
    if mouse.locked == True and mouse.visible == False:
        camera.rotation_y += mouse.velocity[0] * mouse_sensitivity[1]
        camera.rotation_x -= mouse.velocity[1] * mouse_sensitivity[0]
        camera.rotation_x = clamp(camera.rotation_x, -90, 90)

app.run()

How to use it? With texture.load("atlas_grass_cube") ?:

[a2cy]

you need to make your own cube model