Thread:ThePlayer3307/@comment-5234639-20141112235307/@comment-24933133-20141113055521

The number of mods doesn't affect anything other than lag.Invisable blocks could be caused by a ID conflict,which is more prevailent with more mods installed.You see,if Minecraft detects two items using the same ID,it will reject the block and display a grass block in return.In this case it gave the grass block a invis texture which is what you were getting :)