HI, first of all, thank you for this amazing mod ! Awesome work !

I really like using shaders, but when i enable them, all tiles start glitching, in the bellow images i used the (internal) one from OptiFine

I searched on old issues, but nothing resolved my issue, i tried to change Render regions and VBOS settings, Render regions just make tiles turn completely invisible like said in previous issues.

I downloaded all your mods from CurseForge,

Minecraft version: 1.12.2
Forge version: 14.23.4.2729
CreativeCore version: 1.9.22_mc1.12.2
LittleTiles version: 1.5.0-pre97_mc1.12.2

Loaded mods:

• OptiFine_1.12.2_HD_U_E1.jar
• jei_1.12.2-4.11.0.204.jar
• CreativeCore_v1.9.22_mc1.12.2.jar
• LittleTiles_v1.5.0-pre97_mc1.12.2.jar

Screenshots:

With Shaders enabled

Without Shaders:

Maybe i use the worng forge version ? Thank you.

Just try to out pre100, it should solve your issue. Don't forget to update CreativeCore as well.