so i dont know if it is the graphics card but i bought a prebuilt hp computer it says it has amd Radeon veg 8 graphics and when im play games like Roblox and Minecraft on trees like during the night or when its dark in that area it has like a flicker of the same color as the tree on Roblox but on Minecraft the wood has like a while glow coming off it and they only appear when im moving other wise u cant see it please help if its my graphics im planning on upgrading it but if its not i really need help cause IT REALLY BOTHERS ME please help and it doesn't show in a picture!!!!!!!!