In the original DM, a wall decoration object generally appears to have a FRONT view and a SIDE view. In the SIDE view, this is the bitmap displayed on the side wall of the tile in front of the tile the party is standing on.
The standard decoration bitmap is generally about one third the width of a wall tile. I want to make a decoration object - such as an alcove object - that is wider than the standard one. Assuming this hypothetical new wide alcove graphic is almost full width of a standard wall tile, this means that this object would be seen on the tile the party stands on. Ie, the SIDE0 wall.
Therefore, to make a wall custom decoration object visible on this SIDE0 wall, should have a corresponding SIDE0 bitmap - ie, it would be a wall object with more than one SIDE view bitmap, much like a floor object has SIDE0, SIDE1, SIDE2, etc... As described above, the original DM and RTC clearly can't achieve what I would need as it only provides FRONT and SIDE bitmaps for a wall object.
Therefore (and if you're still following my terrible explanation!
