I see a steppy line drawing under 60Hz...

[tulamide]

Any effort that tries to eliminate a system-wide issue, in this case 'tearing', will fail for any other person and any other application. You can try to find a solution for your plugin on your pc in exactly your configuration, but that''s all. Unless you hook into the system's graphic buffer to prevent the buffer being written while a frame is to be displayed (which is the cause for tearing).

[Nowhk]

I see boss! So the only way is what you already suggested, and go with OpenGL. But thats a complicated task for just draw a cursor.

I need to achieve many others important task in FlowStone before this I'll pin it in my future homeworks.

Or maybe draw only a small portion of the progression instead of a whole vertical line (such as the current Graph path processed during the time with a different color, since I'm elaborating an LFO shape).

[Nowhk]

here do not...

For curiousity: if you drag fast the cursor inside the Looper/Player by Exo, did you see the same tearing artefact?

Because It uses the same principle of drawing...