After entering a test world on a modpack I am developing, I have noticed that a specific arrangement of connected textures for grass/dirt blocks makes the texture invisible and gives me a noclip-esque view through the world. Below link is a screenshot of said issue as well as a google drive link to a folder containing all the logs:

What It Looks Like

All The Logs I Could Gather

It looks like you have Optifine and some other render mods installed, please reproduce without.

Oh, apologies for the time-waste then. I'm hoping there is a way to disable CTM's effect on all blocks except Chisel blocks, yet keep it so I can keep Chisel in the modpack but I'm not even sure that's possible. Would be a much simpler solution though.. I can do without CTM grass.

Nevermind I believe I found this myself in the configs :)

EDIT

Seems that'll disable CTM for chisel too.. I wish there was some sort of filter you could set on blocks.