Blocks

One section per family / decor set (concept §4.2), filled in by the family issues.

#Relic cache and relic artifact

Data preservation: nothing from the old world disappears silently.

• Relic cache (tinfoil:relic_cache): a sealed coffer stamped CLASSIFIED that stands in for a block entity the port couldn't map. Breaking it releases its Items: stacks whose item still exists are upgraded from 1.20.1 with Minecraft's data fixers (enchantments, damage, names survive); the rest become relic artifacts.
• Relic artifact (tinfoil:relic_artifact): an item that remembers the original id and NBT (tooltip "Relic of "; F3+H shows the tag count and data version).
• /tinfoil relic inspect (look at a cache or hold an artifact) prints the stored origin; /tinfoil relic list [chunkRadius] counts caches in loaded chunks.

#Block-entity format written by the porter (porter remap)

{ id: "tinfoil:relic_cache",
  tinfoil_origin: { id: "ironchests:iron_chest", state: "ironchests:iron_chest[facing=north]",
                    data: { …original block-entity NBT, incl. Items… }, data_version: 3465 } }

The block itself is tinfoil:relic_cache (no properties). x, y, z are set; data is the untouched 1.20.1 NBT (id, position and Items included). A cache is written for every relic_cache row of block_entities.csv whose BE carries something (items, text, fluids, owners; bare numbers don't count), for converts the porter can't express (e.g. iron chests with contents, stoves with more than three stacks, paintings that would overlap), and for kept BEs whose block the table maps to air or a Tinfoil block.

#Relic artifacts written by the porter

Items that items.csv maps to tinfoil:relic_artifact come in two shapes, depending on whether Minecraft's DataFixer will upgrade the container they sit in:

• 1.20.1 stacks (vanilla containers, entities, player data; the DataFixer upgrades them on load): {id: "tinfoil:relic_artifact", Count: n, tag: {tinfoil_origin: {id, state: "", data: <original stack NBT>, data_version: 3465}}}. The DataFixer moves the unknown tag into minecraft:custom_data, so the mod converts custom_data.tinfoil_origin into the tinfoil:relic_origin component (RelicArtifactItem.migrate, done; was a follow-up in mod/).
• 1.21 stacks (modded containers the DataFixer skips, e.g. handcrafted:container): {id: "tinfoil:relic_artifact", count: n, components: {"tinfoil:relic_origin": {id, state: "", data, data_version: 3465}}}.

#Block families

Generated from porter/mappings/tinfoil_blocks.csv (the porter decides what exists). Textures: tools/art/stone-textures.mjs, tools/art/material-textures.mjs; sheets in docs/art/MOODBOARD.md. Every block has a recipe: one crafting entry per family from vanilla materials, the rest from the stonecutter (slabs ×2).

family	blocks	replaces (blocks in the transfer zones)
ancient_shingles	ancient_shingle_slab, ancient_shingle_stairs, ancient_shingles	1,702
atlantean_marble	atlantean_marble, atlantean_marble_brick_slab, atlantean_marble_brick_stairs, atlantean_marble_brick_wall, atlantean_marble_bricks, atlantean_marble_button, atlantean_marble_lines, atlantean_marble_pillar, atlantean_marble_slab, atlantean_marble_stairs, atlantean_marble_tile_wall, atlantean_marble_tiles, atlantean_marble_wall, chiseled_atlantean_marble, chiseled_atlantean_marble_pillar, polished_atlantean_marble, polished_atlantean_marble_slab, polished_atlantean_marble_stairs, small_atlantean_marble_brick_stairs, small_atlantean_marble_bricks	9,162
bermuda_stone	bermuda_stone, bermuda_stone_brick_stairs, bermuda_stone_bricks, bermuda_stone_button, bermuda_stone_lines, bermuda_stone_pillar, bermuda_stone_slab, bermuda_stone_stairs, bermuda_stone_tile_slab, bermuda_stone_tile_stairs, bermuda_stone_tiles, bermuda_stone_wall, chiseled_bermuda_stone, polished_bermuda_stone, small_bermuda_stone_brick_slab, small_bermuda_stone_bricks	4,857
crop_circle_mosaic	acacia_crop_circle_mosaic, acacia_crop_circle_mosaic_slab, birch_crop_circle_mosaic, birch_crop_circle_mosaic_slab, blue_crop_circle_mosaic, blue_crop_circle_mosaic_slab, brown_crop_circle_mosaic, brown_crop_circle_mosaic_slab, cherry_crop_circle_mosaic, cherry_crop_circle_mosaic_slab, green_crop_circle_mosaic, green_crop_circle_mosaic_slab, jungle_crop_circle_mosaic, jungle_crop_circle_mosaic_slab, oak_crop_circle_mosaic, oak_crop_circle_mosaic_slab, red_crop_circle_mosaic, red_crop_circle_mosaic_slab, white_crop_circle_mosaic, white_crop_circle_mosaic_slab, yellow_crop_circle_mosaic, yellow_crop_circle_mosaic_slab	6,395
crop_thatch	crop_circle_bale, crop_thatch, crop_thatch_slab	2,549
gantry	gantry_bars, gantry_mesh_fence, gantry_railing, gantry_support, timber_support	1,113
hangar_alloy	hangar_alloy, hangar_alloy_casing, hangar_alloy_plating, hangar_alloy_slab, hangar_alloy_stairs, hangar_tarmac, olive_hangar_tarmac, olive_hangar_tarmac_slab	1,526
herringbone_stone	dark_herringbone_stone, herringbone_stone	582
ley_tiles	chiseled_ley_tiles	207
megalith_limestone	chiseled_megalith_limestone, megalith_limestone, megalith_limestone_bricks, megalith_limestone_lines, megalith_limestone_pillar, megalith_limestone_stairs, megalith_limestone_tile_slab, megalith_limestone_tile_wall, megalith_limestone_tiles, megalith_limestone_wall, polished_megalith_limestone, polished_megalith_limestone_slab, polished_megalith_limestone_stairs, small_megalith_limestone_brick_stairs, small_megalith_limestone_brick_wall, small_megalith_limestone_bricks	2,976
polygonal_masonry	polygonal_masonry	54
pyramid_sandstone	pyramid_sandstone_brick_slab, pyramid_sandstone_brick_stairs, pyramid_sandstone_brick_wall, pyramid_sandstone_bricks, pyramid_sandstone_pillar, small_pyramid_sandstone_brick_slab, small_pyramid_sandstone_brick_stairs, small_pyramid_sandstone_brick_wall, small_pyramid_sandstone_bricks	12,310
tartarian_brick	cracked_tartarian_bricks, mixed_tartarian_bricks, mossy_tartarian_brick_slab, mossy_tartarian_brick_stairs, mossy_tartarian_bricks, tartarian_brick_pillar, tartarian_brick_slab, tartarian_brick_stairs, tartarian_brick_wall, tartarian_bricks, tartarian_column	20,274
tunguska_brick	chiseled_tunguska_brick, cracked_tunguska_brick_stairs, cracked_tunguska_brick_wall, cracked_tunguska_bricks, dark_tunguska_brick_pillar, polished_tunguska_brick, polished_tunguska_brick_button, polished_tunguska_brick_slab, polished_tunguska_brick_stairs, tunguska_brick_pillar, tunguska_brick_slab, tunguska_brick_stairs, tunguska_brick_wall, tunguska_bricks	10,211

Shapes: cube, pillar, slab, stairs, wall, button, pane (gantry_bars), fence, and three Blockbench models: tartarian_column (8×8 px column), gantry_support/timber_support (ceiling beam along an axis), gantry_railing (catwalk edge). All three are waterloggable.

#Decor

34 pieces, one Blockbench model each (art/blockbench/), facing the player, waterloggable, all from the stonecutter (cut from the material they're carved or cast from):

#Ruin & anomaly pieces

Procedural and deterministic in a seed (logic/ruin/RuinBuilder), placed by the fold passes, the native Ancient Islands and /tinfoil ruin place <piece> [scheme] [seed]:

fallen column · wall fragment (ragged top, trapezoid doorway, glyph band) · rubble pile · half-buried monolith (glow line) · moai head (buried to the chin) · stone sphere · saucer wreck (tilted, glowing ring, scattered plates) · antenna mast · bunker hatch · crop circle · geoglyph.

• Materials: ruin schemes in data/<ns>/tinfoil/ruin_schemes/*.json (statue-scheme format plus optional metal, metal_dark, rubble, mark): atlantean, bermuda, megalith, pyramid, tartarian, hangar wreck, crop circle, geoglyph.
• Patterns: data/<ns>/tinfoil/patterns/*.json {kind: crop_circle|geoglyph, rows: ["..#.."]}; our own designs.
• Crop circles and geoglyphs only press into natural ground (dirt, grass, sand, farmland, terracotta, gravel) and clear the plants above; they never cut into builds or water.
• New block: Rubble (1–8 layers like snow, never melts; 8 from cobblestone in the stonecutter).

#Conspiracy board

A cork board that hangs on a wall (place it against one). Right-click with an item to pin it in the quadrant you clicked (one item; it's shown flat on the cork); an empty hand takes it back. Use string on a pinned slot, then on another pinned slot up to 16 blocks away (same or another board): a red string connects them. Unpinning cuts the strings of that slot. Two boards from 8 sticks around a plank. The renderer (items + strings) is client-side and was checked only by compiling; look at it in the dry run.