(extensions.lightmaps) Select Faces lump for Source Engine lightmap_faces

[snake-biscuits]

I'd like to compare Faces to FacesHDR
Specifically how the lightmaps compare

Currently lightmaps.source.face_lightmaps generates a LightmapCollection w/ both LDR & HDR
I'd like to split this into face_lightmaps & face_lightmaps_hdr
This could handle a pair of lumps

• FACES & LIGHTING
• FACES_HDR & LIGHTING_HDR

Would probably need a wrapper that selects one or the other
Since some maps only have LDR or HDR, tho plenty have both.

OriginalFaces could be wierd, which LIGHTING lump do they use?

There's also the per-face lightmap texel to consider
(encode in vertex.colour when remapping uv1?)