Why do models turn invisible when submerged in water from imported terrain?
For some reason, if any model is placed in water that was part of a pre-made schematic or was imported from a Minecraft world (as is the case in this screenshot), the part of the object that is in the water becomes completely invisible. However, if a model is placed in a single block of water that was added using the Workbench, then the model can be seen through the water (as can be seen in this screenshot - the part of the diamond sword in the imported water is invisible, but the part of the sword in the single block of water is visible).
Changing the opacity of the imported terrain/schematic also doesn't help - the submerged model doesn't even become visible again until the opacity of the imported water is 0%.
Why does this happen?
How can I make it so that the models can be seen through the imported water? (other than removing all of the water from the original world and then replacing each block of water individually in Mine-imator afterwards)