Would be awesome if storage drawers could be waterlogged to allow underwater storage centers in 1.15+.

I have a patch to 1.15 that appears to make this work, but has some clipping issues in various viewing angles. Wanted to first check with you on whether or not you'd be amenable to such a patch before spending more time on it.

Screenshots:

Non-waterlogged storage drawer
Waterlogged storage drawer (uses my patch):
The current rendering issue I'd need to look into

TL;DR: on the work I've discovered (for 1.15 branch):

1. Register BlockStateProperties.WATERLOGGED as a property of storage drawers
2. Implement IWaterLoggable
3. Override getFluidState to return still water state if waterlogged.
4. Override getStateForPlacement to check if placing into a block with FluidState of an appropriate water level, if so auto-waterlog the block.

Not sure where to look for the rendering issue that clips the front, but I can try to chase that down.

This would be a great fix.

Regarding the rendering issue in the last image, that's (most likely) not related to your waterlogged change - that's been reported multiple times here and is related to there being a solid block directly in front of the half drawer.