Block borders flash with black color sometimes, especially when the player is looking in a straight angle towards axes. Perhaps related to #2. Possibly correlated is the fact that a shape going from the center of the screen is shown when the tearing happens, this is visible only in wireframe mode.
When in underground and view range set to 0, even weirder things happen, sometimes the whole texture atlas can be seen over the "shape going from the center", additionally depth-buffer doesn't work properly.
Block borders flash with black color sometimes, especially when the player is looking in a straight angle towards axes. Perhaps related to #2. Possibly correlated is the fact that a shape going from the center of the screen is shown when the tearing happens, this is visible only in wireframe mode.