Strange drawing on Debian 10

@isaac wrote:

hello! title says it all. i have been using openFrameworks for a couple of months, sticking mostly to 2d drawing or 3d wireframes without any lighting. today i started a fresh project and decided to experiment with ofLight.

i used ofDrawSphere to put a sphere in the middle of the screen, and moved it along the Z axis (-300 to 300), with an ofLight point light at 0,0. it produced this:

i have noticed some screen tearing and other minor graphical glitches when using drawing in 2d, but it hasn’t been anything worth posting about until now. i have a feeling its something related to the setup of my system rather than oF, but i wasn’t sure where else to ask for help!

if anyone could point me in the right direction to fix this strange drawing, it would be greatly appreciated.

thank you

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