Mod: LittleTiles_v1.5.0-pre199_34_mc1.12.2
Core: CreativeCore_v1.10.16_mc1.12.2.
Optifine: OptiFine 1.12.2 HD U F5

Got issue with rendering textures properly. After restarting the game textures become invisible.
Works good without optifine, but we can't play without it. So we are looking for some troubleshooting.

But I don't see anything wrong with your picture.

There are 2 blocks of grass on screenshot. Let me show my problem in gif

Which textures? If it's stuff like grass, leaves and glass, you'll have to set mipmap to at least level 1.

It doesn't helped

Which textures? If it's stuff like grass, leaves and glass, you'll have to set mipmap to at least level 1.

But I don't see anything wrong with your picture.

I never seen that problem before but I'm pretty sure it's not caused by Optifine. I use the same versions as you and have not run into this, nor did we get any reports about it.

Can you try with just LittleTiles, CreativeCore and Optifine in a separate profile?

I never seen that problem before but I'm pretty sure it's not caused by Optifine. I use the same versions as you and have not run into this, nor did we get any reports about it.

Can you try with just LittleTiles, CreativeCore and Optifine in a separate profile?

I've just reseted all graphics settings and now it works properly. So, I guess, trouble in one particular optifine setting.

Problem resolved