I don't have any actual 'code' to show for this, seeing as I haven't tweaked with movement much at all.
//not applicable.

Problem description:
Well, I recently swapped over to 16x16 tiles instead of 32x32 and for some reason, mob movement is lagged and glitchy.
I already tried editing the pixel_step_size, but that made little difference at all.

Any theories as to why this is happening? Am I forgetting something to change when editing tile size?

Thanks in advance!
Did you try adjusting any of the below:

icon_size var (world) - Default: 32

tick_lag var (world) - Default: 1

animate_movement var (movable atoms) - Default: FORWARD_STEP(1)
In response to Gizhy
I already fixed this, but thank you anyway, bro.