Some custom textures used in maps (liquid surface & geo crater) are not included in generated level packfiles

[GooberRF]

Currently, when creating a level packfile from RED, the resulting vpp includes textures used on level geometry and decals. It does not include textures used exclusively as the bitmap for a Room Effect liquid surface or geo crater texture ("Default texture" in level properties).

This has resulted in several maps being released missing liquid/geo crater textures.

A workaround does exist (which I've used frequently - texture a geometry surface within the map with the texture in question so it's included in the packfile), but it is a hackfix and isn't particularly intuitive.

It would be ideal for the editor to include textures used as liquid surface for Room Effects and geo craters to be included in the generated level packfile from RED.