Action rendering not scaled for non-default render size

[julienma96]

I believe I found a bug that appears twice in the code.

In the _render_frame method of class PushTEnv there is this code (lines 223-225):

coord = (action / 512 * 96).astype(np.int32)  # <--- bug: should be self.render_size instead of 96
marker_size = int(8/96*self.render_size)
thickness = int(1/96*self.render_size)

Same thing happens in the _get_obs method of class PushTImageEnv:

coord = (action / 512 * 96).astype(np.int32)  # <--- bug: should be self.render_size instead of 96

Question: Just to have my mental model right on this one: This affects only the cross that's solely used for visualization purposes right? So model training and inference is independent of the suggested change?

Thanks in advance!