On low graphics settings, a thin line of the skybox is visible when looking up at the building behind the truck to the right of T-spawn. This only appears on lowered or low graphic settings, which suggests an optimized prop or func_detail has been removed when it is desirable to cover this gap.

I will share this bug report at multiple places as I am unsure where FMP0NE and Volcano would like bug reports. My OCD is strong with this one, with this skybox seam.