v0.3.0 — the release that made the kit's claims true

The release that made the kit's own claims true and closed the gaps that let broken art ship green.

Install: download simutrans_blender_kit.zip below, then in Blender go to Edit → Preferences → Add-ons → Install…, pick the zip, and enable "Simutrans Blender Kit".

Fixed — things that produced wrong artefacts

• Signals never lit. The purple signal lamp was written as #E100E1, the colour the game draws, not #FF017F, the colour makeobj matches. A signal painted the way the kit recommended compiled its lamp as a flat colour that could never light. The reserved-colour table is now read from the engine source, not transcribed, and every one of the 31 colours is checked byte-for-byte inside a real .pak.
• Ways and catenary were invisible on slopes. Neither emitted slope images, and the engine has no fallback for them (weg.cc:545, wayobj.cc:270 are unguarded), so anything the kit made vanished on every hill. The artist now models one more shape (way_slope / wayobj_slope) and the four slope images are emitted — all four or none, because the engine indexes them by position and a partial set draws the wrong image.
• The pakset height step was wrong. It was hard-coded to 16 for every pakset; pak128's own simuconf.tab says 8. It had never bitten because the field was read by nobody — until the slopes needed it. Now taken per pakset.
• Sprites carried the author's home directory. Blender writes the .blend's absolute path into every PNG's metadata; every published sprite leaked it. Turned off, and pinned by a byte-scan test.
• The render engine and colour management were unpinned. The same .blend gave different sprites under EEVEE and Cycles, and the tone-mapping-off setting was wrapped in a silent try/except. Both are now set and verified; the kit refuses to render rather than produce silently wrong colour.

Added

• Material buttons. Player colour, the night lights and plain paint now have a panel button. They were reachable only from a script before — the one thing an artist most needs, and the hardest to get to.
• Render warnings reach the panel. Clipping and accidental-reserved-colour warnings used to print to a console no artist has open while the panel said "Rendered". They are reported in the panel now.
• Write .dat without re-rendering. Change a number — power, cost, a coupling — and rewrite the .dat from the last render's frames instead of rendering every heading again.
• Linter: value validation, rule codes, --json, and an ignore pragma. It checks that a number key is given a number, tags each finding with a stable code, can emit JSON, and honours # bkit: ignore=<code>. Two silent bugs fixed: it crashed on a malformed range, and its missing-icon rule was masked for a second object of the same type in one file.

Changed

• The test loop is closed. Nothing used to compile the .pak the game suites loaded; they ran against art that could be days old. The runner now renders, compiles and installs from this run's sources, and the game scenarios assert what they report (car count, order, that the unit is really electric, that it moved) instead of printing it.
• Licence is MIT (see LICENSING.md), replacing an Artistic 1.0 claim that was GPL-incompatible for a bpy add-on.
• The example trains credit their modeller (victor_18993), not the tool.
• The toolchain (makeobj, Blender, the headless engine) is discovered rather than assumed to sit at Windows paths, so the suite runs on Linux and macOS too.