- V8 models are placed relative to their global origin (model header).
- A V8 model's extent is the union of its elements' stored ranges; a V7
model's text box is one text height tall.
- Files without a colour table use the standard DGN default table; colour
255 is read from the table's background entry.
- Colours from a file's colour table follow the background: near-white
colours swap with it, and over non-black backgrounds some shades drop a
step.
- DGN contrast pulls towards a pivot taken from the model's own colours,
after the fade, which is blended into the background first.
- Shared cells are read through their full 3D placement, so tilted
instances and 3D definitions are drawn in plan.
- Deleted V8 elements are skipped; lines along the model's extent stay in
the raster.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>