When using shorter workshop playermodels, the camera view when adjusting accessory slots, particularly the “hat” slot, doesn’t line up with the actual player height. In some cases, this can cause rapid flickering.
Use a playermodel that’s short enough, and then click the “hat” section under appearance.
The camera focuses on the playermodel’s head, and the player stays visible.
The camera focuses above the playermodel, which rapidly flickers from visible to invisible due to improperly applied frustrum culling.
Model used in the video: