• Fixed major precision loss on UTM-authored drawings: world_offset now derives from the median of MSPACE entity centroids instead of the DXF $EXTMIN/$EXTMAX midpoint, so a single stray entity can no longer drag the offset hundreds of kilometres away from the real geometry (about 120× better precision on the affected files).
• Fixed Zoom Extents collapsing the drawing to sub-pixel size on files with orphan or block-defn entities leaking into model space.
• Fixed phantom selectable segments from BLOCK / ENDBLK sentinels showing up far from the visible drawing.
• Fixed two text rendering bugs: greek (sub-pixel) rectangle now fills at the text's own color, and the rectangle honours word-wrapped sub-line count.
• Performance: multi-resolution mesh LOD for 3D solids — the render pipeline now picks one of three pre-built tessellation densities per frame based on projected pixel size.
• Performance: hatch LOD substitutes solid fill when pattern spacing falls below ~2 px, and skips draw calls entirely when the whole hatch projects to sub-pixel size.
• Performance: zoom-adaptive curve tolerance for top-level wires — distant arcs no longer emit hundreds of segments that all collapse onto one pixel.
• Performance: text LOD ladder (baseline-line / greek / full) now also applies to MultiLeader text content.
• Performance: paper-space viewport scissor extended to hatch / image / wipeout passes (in addition to the existing wire scissor).

• Fixed creating a new drawing so existing open files remain in their tabs.
• Fixed arc creation to preserve clicked positions and keep internal arc angles in radians.
• Improved OCS/WCS handling, snap points, hatch boundary rendering, and thickness extrusion support.

Initial release of H7CAD.