how can i customize the env?

[dattienle2573]

I want to stack 4 frame instead of 3 frame and covert rgb color to gray scale. How can I do that?

[robertoschiavone]

Currently you get a single RGB frame, there is no stacking. To get what you are looking for, you must use the Observation Wrappers provided by gymnasium.

I'd do it this way:

import flappy_bird_env  # noqa
from gymnasium.wrappers import FrameStack, GrayScaleObservation
env = gymnasium.make("FlappyBird-v0")
env = GrayScaleObservation(env)
env = FrameStack(4)

[dattienle2573]

render_mode = None does not work. I don't want to render everytime I trained the model, so how to resolve this?

[robertoschiavone]

You cannot have frames with render_mode = None. You can use render_mode = "rgb_array_list" to then get the collected frames with render() or reset().

[dattienle2573]

If I resize the env by env = ResizeObservation(env, 80), what part of the env observation space would it keep? Do you have any suggestions if you know another effective way to do this?