Whenever I use the Sonic Ether's Unbelievable Shaders Renewed mod 1.0.0 (installed via OptiFine), for some reason the mixed blocks I made are translucent. Even without shaders, they can still sometimes be a bit buggy, like they'll clip through stuff. I made a house, and without shaders you can sometimes see the blocks through the roof. With the shaders on, all the mixed blocks are transparent. This is kind of annoying. Is there a fix?

This happened to me too, In fact it actually made the whole texture look like water.