Graphical Glitch in Games & Studio

Hello. This recently started when I would open up ROBLOX studio or a ROBLOX game and look at either the brick, cobblestone, or grass texture in full graphics I would see lines outlining the texture. I assume this is because of the texture being designed differently in high graphics here are some pictures from one of my games.

As you can see it only seems to do it where the sun is shining at below is a picture of where the sun shines and where the trees/building block the sun.