Relates to MC-203399.

The bug

The texture used on the bottom faces of hoppers is the same texture used on the sides. This makes hoppers look weird and streaky when viewed from below.

In addition to looking unsightly, this issue was very recently fixed in Java Edition (MC-203399), making this a valid parity issue as well.

How to reproduce

1. Place hoppers
2. Look at them from below

Expected results

Hoppers would use a fitting texture on the bottom. Either the "inside" texture could be reused, or a dedicated bottom texture could be implemented (MC-262455).

Actual results

The side texture is used on the bottom. Since the side texture is designed with the three segments of the hopper in mind, it causes hoppers to look striped when viewed from below.