The bug

The bottom half of allays use a partially transparent texture to make the body appear to fade out further down. The vex model was updated in 22w45a as to appear much closer to that of the allay, however the same area on the vex appears completely opaque, which is inconsistent with the allay.

The texture file for the vex appears to have this region set to opaque, making this an oversight with the texture itself rather than an issue with rendering.

How to reproduce

1. /summon allay ~-1 ~ ~ {NoAI:1}

2. /summon vex ~1 ~ ~ {NoAI:1}

3. Examine the ragged-looking region at the bottom of each mob

Expected results

The vex would have a partially transparent lower half as to be consistent with the allay.

Actual results

It does not, resulting in this inconsistency.