Inventory preview and shulkerbox preview use the wrong texture

[MeeniMc]

Both inventory preview and shulker preview feature use the wrong texture, and composite the textures incorrectly when using a resource pack with diegetic textures for workstations.

Replication steps:

1. Minecraft 1.21.8 (but this is not version specific, very old, possibly forever)
2. Minihud 0.36.3, malilib 0.25.4, fabric-api
3. Install resource pack colourful containers https://modrinth.com/resourcepack/colourful-containers-gui
4. Install minihud
5. use shift on a non-empty shulkerbox, the pink shulkerbox texture will overlap with the colored rendering, the south-east part of the rendering doesn't use the texture.
6. use the inventory preview keybind on a villager, the dispenser (dropper?) texture is used for the villager inventory, the chest texture is used for the villager trades (with a tint if BGColor is active), again south-east part of boxes do not use the texture and look odd.
7. use the inventory preview keybind on a smoker, the furnace texture is used instead of the smoker texture, texture stitching is odd.
8. use inventory preview on a chest, single chest use the shulkerbox texture, double chest uses the chest texture (with south-east stitching error in both case)

Potential solutions:

1. use the correct texture for the correct block, instead of using a generic representative for the type (e.g., furnace for
2. stitch the textures correctly, especially for the south-east corner
3. stitching correctly in all cases may be difficult, potentially texture-pack dependent. Maybe disable applying the texture altogether and always render in vanilla-plain boxes mode?

Some more examples: