Game Version

Vanilla 1.20.5

List all installed mods

No response

List of all loaded packs

Nautilus3D only

Describe your issue

Lily pads have no texture

Hey thanks for reporting!
Turns out Vanilla Minecraft doesn't like uppercase letters in filenames. It works just fine with Fabric/Sodium.

The fix will be in the next update. in the mean time you can replace the affected files:
8191751