The dashboard's copy of the terrain reader in dCommon is gone; main's in dZoneManager reads for everyone, and keeps
what the copy had over it: colour and texture maps from before version 32 become RGBA, cut to the resolution the
client keeps. The scene map (ZoneScenes) and the dCommon tests compile against that reader.
A scene ID takes its layer as the zone file numbers it (0 General, 1 Audio) as well as the enum, so main's scene tools
and tests build; /getscene prints the layer as a number.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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