I would post this on the bug thread however due to lack of privilages I am posting here. I have noticed that some of the blocks get funny colors or grass becoming partly invisible which allows you to see where lava lakes are deep underground. I am not sure what causes this or if this bug is causing corruption of the world and the workaround I have found as of now is to erase the world and load a backup of the world. Could someone look into this, and if needed move this to the bug thread? Thanks in advance.