{"params":{"colorway":{"type":"choice","default":"summer-birch","label":"Colorway","describe":"Curated kit-palette scheme; sets all five zone colours at once. summer-birch is the shipped build: near-white bark, grey weathered foot, near-black dashes, pale yellow-green canopy with a deeper green on the satellite clumps. spring-birch lifts the whole canopy to fresh acid green and lightens the foot. deep-summer drops the canopy to mature mid and deep green and weathers the bark to warm cream. autumn-birch turns the crown gold and amber (a birch yellows, it never reddens) over unchanged white bark. Every scheme keeps the trunk the brightest thing on the asset and the canopy one hue family.","options":["summer-birch","spring-birch","deep-summer","autumn-birch"]},"bark":{"type":"color","default":"#f8f3ec","label":"Bark (pale shaft)","describe":"Albedo of the near-white birch shaft above the foot band, and of every branch and bare twig \u2014 one uniform chalky tone on every facet, because the taper, the flare and the facets are real geometry and the scene lights shade them. This is the identity colour and the brightest zone on the tree; keep it near-white and never let it approach the foliage in hue."},"foot":{"type":"color","default":"#a3a099","label":"Bark (rough foot)","describe":"The coarse weathered bottom 0.45 m of the trunk plus its root flare, where real birch bark darkens and roughens at the ground. Clearly darker than the pale shaft \u2014 at parity the trunk loses its footing and reads as a stick stuck in the ground; too dark and it reads as a hole. Grey or grey-brown."},"dash":{"type":"color","default":"#3a2a1e","label":"Bark dashes","describe":"The horizontal bark dashes: real quads of the trunk skin, one facet wide and 0.11 m tall, at a constant 0.62 m pitch and rotating around the shaft so dashes show from every azimuth. The darkest zone on the tree and the only near-black one; the contrast against the white bark is what names a birch at ten metres, so keep it very dark."},"leaf":{"type":"color","default":"#b3d47f","label":"Leaf (canopy)","describe":"The DOMINANT canopy tone \u2014 the big elongated mass on the leader, about two thirds of all foliage, and the colour the tree is named by at a distance. Pale yellow-green for the airy summer read; this should always be the tone that wins."},"leafShade":{"type":"color","default":"#77b258","label":"Leaf (deeper)","describe":"The deeper green: every satellite clump on the upswept branches, plus two hand-aimed patches inside the big mass (one up-facing, one down-facing, so it is structured foliage variation and not baked shading). Must sit a clear value step below the canopy tone or the clumps fuse into the main mass and the crown reads as one flat ball."},"tallness":{"type":"range","default":1,"label":"Tallness","describe":"How tall this birch has grown, 5.5 m at 0.80 to 6.8 m at 1.06 (6.5 m at the shipped default). REBUILT, not scaled: the shaft gains DASH BANDS at a constant 0.62 m pitch \u2014 five at 0.80, six at the default, seven at 1.06 \u2014 and each band is two more lofted rings, so the triangle count moves with the knob. The trunk THICKNESS, the root flare, the dash size and the canopy masses do not change at all; a tall one is a leggier tree with more bark marks on a longer clear stem, not a photo enlargement.","affects":"geometry","min":0.8,"max":1.06},"clumps":{"type":"range","default":5,"label":"Side clumps","describe":"How many upswept branches carry their own foliage clump around and below the main mass. Each is a real lofted branch plus a real faceted lump, so the triangle count moves. At 3 a sparse young birch \u2014 one tall crown with a few puffs and a lot of visible sky; at 5 (shipped) the reference tree; at 6 a fuller canopy with a clump in every quadrant. The branches are hand-placed at fixed azimuths and heights, so the extra ones fill the empty quarters rather than widening the tree, and the spread stays inside 3.1 m at every value.","affects":"geometry","min":3,"max":6,"step":1},"canopy":{"type":"range","default":1,"label":"Canopy fullness","describe":"The size of every foliage mass \u2014 the big elongated crown and all the satellite clumps together \u2014 from 0.82 (a thin, wiry, see-through birch with a lot of branch showing) to 1.20 (a heavy, nearly closed canopy where the clumps merge into the main mass). A foliage blob has no repeating structure inside it, so this knob honestly resizes the masses instead of pretending to rebuild them; the branches re-solve their tips against the new surface so no twig is ever left stopping in open air, and the trunk, the branches and the dashes are untouched. The two rebuilding size knobs are tallness and clumps.","affects":"geometry","min":0.82,"max":1.2},"scale":{"type":"range","default":1,"label":"Scale","describe":"Scales the whole model; 1 is as built. Real-world size is in this range (real height is 10-25 m, as built 6.49 m).","affects":"geometry","min":1,"max":4.25,"step":0.05}},"presets":{"summer-birch":{"bark":"#f8f3ec","foot":"#a3a099","dash":"#3a2a1e","leaf":"#b3d47f","leafShade":"#77b258"},"spring-birch":{"bark":"#f8f3ec","foot":"#e0dfdb","dash":"#4a3527","leaf":"#c8d98a","leafShade":"#93c46a"},"deep-summer":{"bark":"#e0d2b4","foot":"#87847c","dash":"#25402c","leaf":"#93c46a","leafShade":"#4c8140"},"autumn-birch":{"bark":"#f8f3ec","foot":"#a5855e","dash":"#3a2a1e","leaf":"#f0c05a","leafShade":"#e2833f"}},"rev":1792622168,"materials":{"bark":{"kind":"wood","finish":"raw"},"foot":{"kind":"wood","finish":"raw"},"dash":{"kind":"wood","finish":"raw"},"leaf":{"kind":"foliage","finish":"leaf"},"leafShade":{"kind":"foliage","finish":"leaf"}},"materials_note":"what each colour zone is made of: `kind` and `finish` name a procedural PBR material in https://polyfork.dev/materials.mjs (dressByAlbedo finds a zone by its albedo in COLOR_0). A zone not listed has not been classified.","preview_v":1792622176,"mod_v":1792622168}