How do I add images etc. to the mouse cursor (without lag?)

[gertkeno]

The post you linked described how to reduce input lag, it seems like you’ve followed most of the advice. That is the most you can do, without writing your own operating system.

Fix Mouse Position Lag

This is inherent to how the OS mouse cursor is drawn compared to any other window, and is not an issue exclusive to Godot. You can’t fix this entirely unless you replace the mouse cursor image with the sprite’s texture, which you can do using OS.set_custom_mouse_cursor(). The arrow will still appear to lag behind slightly though, which you could mitigate by making look_at() point towards the extrapolated (predicted) mouse cursor’s position instead of its current mouse position. Doing so will int…

@SirMaoh

Also I need to see the mouse cursor for the game.

You can hide the OS cursor and draw your own Godot cursor, it won’t look like it’s lagging anymore.