Alex's Caves RENEWED

• Entity renderers — full sweep, 137 markers across 71 files, plus the render-state foundation (ACNestedEntityRenderer, camera capture, one-shot double-draw suppression)
• Cave book — the whole picture-in-picture subsystem, then all five page widgets (image/item/entity/entity-box/recipe)
• 12 block entity renderers onto the submit pipeline
• All 22 shaders — 10 pipeline-state only, 6 needed AC's own GLSL, plus the post chains they feed
• Cave map renderer, spelunkery table, submarine lit body + floodlight cone
• Watcher watcher_perspective post chain (the "bubble")
• Item magnetism → :common (Fabric had no magnetic entity layer at all)
• JEI nuclear furnace → 26.2's network-synced RecipeMap
• Fabric rarity name colours → item tags + 3 mixins
• 22 mixins moved :neoforge → :common (11 worldgen, 11 gameplay), closing the Fabric parity gap

Fixed — crashes

Teletor · 7 ClassCastExceptions waiting on the Fabric client · multipart part-id (Fabric attack) · sack-of-sating tooltip hover · maglev render mixin at boot · nuclear furnace destroying itself on placement

Fixed — silently dead (compiled, did nothing)

• 15 of 17 armour pieces drew nothing at all — no equipment JSON
• Every baby AC mob rendered adult-sized — branch behind if (false)
• MagLev minecart was an unhittable client-side ghost — cancelling tick() also cancelled the client's only interpolation hook
• 34 missing-texture warnings a boot — a 1.20.1 atlas AC still shipped
• Rainbounce anchor and the totem's binding hook — two no-ops from defaultRequire: 0
• Shared static models drawing with the last entity's pose
• Polarity trim atlas in a path nothing reads

Fixed — behaviour

Rainbounce boots (didn't bounce, then flung you to lightspeed) · siren light dyeing · cave map's three states + item frames · jelly bean ×2 + primordial raw-meat bonus · Vallumraptor TEMPT_RANGE · /locate for AC biomes · random_patch migration · featuresPerStep · cave biomes generating with their surface rules on Fabric · heat tint · peppermint red flash, then its purple-witch aura · Watcher possession mask, own-body render, XP frame · culling sweep across 12 renderers

Added

Frosting block tint on Fabric · AC's four dynamic item tints · submarine first-person cabin composite (added, reverted, re-landed)

Deleted / settled

PostEffectRegistry (superseded) · pre-26.2 shader sources · ItemEntityMixin (double-ticked magnetism) · two unregistered mixins settled — one was a lost feature, one can never apply · the three "AI regressions" were not regressions (a creative player can never be targeted) · abyssal chasm is meant to be underwater

Known gaps

Magnet eye-height on Fabric · WatcherPossessionAccessor Fabric-dead · no Fabric JEI plugin despite the deps being wired · submarine_light/sugar_rush chains still pre-26.2 · Tremorsaurus culling box · filled-map cabin icon · ItemFrameRendererMixin

Caveat on the last commit: the four features in f1041844 are proven by build + boot only, not by eye.