I had other issues in the past so I downloaded the newest versions of LT and CreativeCore, but now the outline of where made blocks, doesn't matter if hammered or full doors/beds/etc, isn't there anymore, glitchy at best.
I do believe it's a problem with either OptiFine or thaumcraft but I would like to keep playing with both.
If you could help it would be great, Thanks!

forge1.10.2-12.18.3.2254

Sorry, but I don't support 1.10.2 anymore. I highly recommend to update to 1.12.2. Thaumcraft has already updated.

alright, I'll try it out. Thanks for the quick answer

Ok just changed all mods to 1.12.2 and tried it again, same problem. When OptiFine is in the mods folder I can't see the outline of the LT blocks