- Merge the eight additional commits from PR #1254.
- Preserve closure guards while refreshing object and hidden 3D views.
- Stop hidden crossfade timers and verify frame retention.
- Merge the unified Studio interface and command entry points.
- Adapt water views and provisional sampling to basin hydrology.
- Restore diagnostic estimates and the biome water overlay.
- Fix render cancellation, preview closure, and platform position callbacks.
- Fall back to software rendering when native bindings are unavailable.
- Cover renderer, lifecycle, and scheduler regressions.
- The route-and-reject hydrology system and its probes are removed
- Hydrology is configured under dimension hydrology and per biome, region and dimension hydrologyPolicy
- riverPolicy and the old hydrology config types are gone
- Grid kernels cover priority flood, D8 routing, flow accumulation, basin extraction, breaching and stream burning
- A basin spills at its pour point and an interior bump can never be the spill
- Region plans cover 4096-block regions on a 64-block grid for major rivers and lakes
- Window plans cover 512-block windows on an 8-block grid for reaches and ponds
- Plans are cached in memory, persisted per world under iris/hydrology and keyed by pack, seed, world height and settings
- Only the main runtime of an engine persists plans and stores swap on hotload and default runtime change
- Demand rasters outrank prefetch and stopping pregen withdraws its queued prefetch
- Ponds come from natural basins, seeded cups and chained cups with strictly falling levels
- A pond level never exceeds its rim plus maxFill or the end grade of any inflow
- Pond outlet loops are opened at their lowest pond
- Reaches split at junctions, pond outlets and 256-block grid lines
- Reaches meander, fit the valley, grade to a running minimum and smooth with Chaikin passes
- Drops of two blocks or more get a lip and one-block corner steps become dry rim ledges
- Cascades and waterfalls write falling fluid from the mantle at level eight
- Inflows into region lakes end at the lake level
- River mouths and water beside the sea sit at the sea surface
- The per-chunk raster gives terrain height, water head, role, tier, fluid, cave ceiling and shore distance
- WaterRole codes are stable and exposed to packs through the WATER_ROLE engine stream
- WATER_HEAD replaces the old river engine streams and an unknown stream name fails the pack load
- Banks take SMOOTH, LINEAR, CONCAVE, TERRACED or CLIFF profiles
- Containment berms grow as tall as the water needs
- Columns within two blocks of water stay solid and keep no Terrain3D overhang
- Seam dams hold water where new chunks meet chunks generated earlier
- The transition blend skips hydrology-owned columns
- Caves stay at least two blocks below river and pond beds
- The painter is the only writer of still water
- Objects cannot open water, falls or bank ground and solid objects may stand in water
- On-water objects need fluid at their anchor column
- Floating child islands stay out of channels
- Sea inlets run inland from cliff coasts at sea level and end in a chamber pool
- Inlet passages are sealed against carvers, subterrain features and the post pass
- Cave pools settle into carved lows, keep one fluid and stay out of inlet space
- Pool and inlet cells use their own cave actions in mantle data
- Water vegetation lists sit on tiers, ponds and hydrologyPolicy with SEA_FLOOR, SEA_SURFACE and SHORE_LINE parts
- Pack validation compiles hydrology settings and rejects empty or water-holding palettes
- Chunk generation fails closed when its 3x3 water rasters are not planned
- /iris find covers stream, river, major river, cascade, waterfall, mouth, pond, lake, dam, sea inlet and cave pool
- Generation history records the new feature types and drops old hydrology entries
- The studio map draws water from rasters up close and from plans when zoomed out
- Pregen prepares the current region and one region ahead
- hydrologyProbe, riverTransectProbe, hydrologyBlockProbe, seaInletProbe and cavePoolProbe report containment, rises, seams, tick conversion and missing surface
- Test forks run with a 2 GB heap, a 60-minute timeout and the Mockito agent loaded explicitly
- Generation with hydrology off is unchanged
- Natural terrain capture scans columns as block state runs
- Biome samples reuse the palette index of an identical key
- Cave biome capture samples the subterrain planner directly when live
- Repeated object markers skip decoding
- Saved biome encoding hashes each distinct column once
- Bounds starcasts share whole-column base biome samples across threads through a heap-sized lock-free memo
- Erosion raster geometry tracks station owners in paged local arrays and builds its index map in first-visit order
- Structure volume caches read through concurrent maps and publish only current builds
- Natural terrain receipts reuse a per-thread deflater with the platform gzip framing
- Tests pin receipt and saved biome bytes across reused compressors
- Clump randoms use a plain-field LCG with the RNG sequence and a step jump
- Single-block palettes build footprints from row masks and jump the pick draws
- Ellipsoid nodes, row offsets and node sines reuse thread scratch and size tables
- Terrain-scoped footprint plans that cannot reach the chunk surface are skipped
- Above-terrain plans are skipped when no solid host sits above the surface
- Preparation runs as at most four balanced slices with one join per chunk
- Placement caches target, bedrock and replaceable checks per block state
- Roots without selectable children resolve to themselves before the per-column child cache
- Selection plans build through one shared helper for root checks and child selection
- ChunkBakeCache.fillColumns batches the missing requested columns of one chunk plane and publishes them
- BakedDoubleStream and BakedStream expose fillColumns with the per-column fallback when memoization is not allowed
- Carve profile field reads heights, regions, surface and cave biomes from the nine overlapped chunk planes
- Fluid presence samples the fluid plane only for columns below the fluid height
- Carving reuses one dimension carving resolver state per thread scratch
- Bake recent-entry memo holds a 16-slot per-thread chunk table instead of one entry
- Subterrain cells for carve and decoration resolve through a per-chunk sampler with a column height hull instead of per-block engine dispatch
- IrisEngine subterrain lookups read the thread frame and runtime once and memoize the dimension gate, removing the per-call disabled-component list scan
- Unrouted workers resolve cave biomes through the captured carving snapshot and column cache with subterrain biomes checked first
- Captured cave biome lookups bypass the per-voxel hash cache
- Internal carve walls come from word-level column masks instead of hashed neighbor puts, painted after cheap solidity and surface checks
- Floor and ceiling layers are memoized per column when the biome layers do not depend on the zone height
- Zone scanning walks carved runs, the decoration scan memoizes block solidity and reuses the previous block, and waterlogging normalization skips snapshots without hydrology
- Boundary walls read own cells straight from the snapshot; the unused snapshot face builder and face accessors are removed
- Terrain batch scratch marks reset in finally blocks so a failing kernel cannot grow the scratch
- Generator evaluation counters only count when generation counters are enabled
- Core tests run with generation counters enabled
- Bake capacity derived from the heap (13 KB per entry against 1/32 of maxMemory, 2048 to 32768 entries); detached runtimes use the floor
- Pregeneration profile no longer raises the global noise cache size or the bake; it only raises burst parallelism
- Removed the hydrology bake reservation, noise cache budget, expansion machinery and the tile cache terrain preparation hook
- Bake thread recents compare a generation counter; clear empties retired entries
- Removed unused column bake, bake registry and bake accessors
- Object placement bakes split into one per-object layout (palette, tiles, canopy) and per-variant offsets
- Variants beyond the per-object limit are built transiently instead of clearing the variant map
- High-variant golden and no-rebuild tests
- A caller whose submission window is full runs the next component itself instead of parking
- Pass barriers run still-queued component tasks in reverse order before waiting
- Queued component tasks reopen the submitting generation's runtime scope on whichever thread runs them
- Helpers only run queued tasks bound to their own runtime or when they hold none
- A finished submission no longer reports a task as dropped once a helper started it
- Burst worker scope test keeps one stage on a worker while the caller helps
- Cell lattice passes gather every missing corner sample of the pass and evaluate base, detail and modules through NoiseProgram.fillPoints3D
- Warp B samples and single-row warp A samples are evaluated as one point batch per pass; longer warp A runs keep fillColumn3D
- Module bands compact their points before the batch call and scatter back in the original accumulation order
- Lattice batch buffers and their NoiseScratch live in a per-thread CaveLatticeBatch chain that nested carves acquire separately
- Lattice test compares pass-wide point batches against scalar plane density bit for bit
- Hydrology planner height reads reserve bake capacity up to the hydrology cache target from the shared budget
- Planner reservation is released when the complex closes
- Log transaction writes in parallel arrays instead of mutation records
- Replay source plans straight from their packed cells without decoding records
- Build source plans from a log slice
- Journal commit originals in a packed-key set instead of a linked map
- Buffer cave object writes in parallel arrays
- Drop the now-unused import in the runner
- Hydrology planner height and natural samples memoize columns in the bake like other reads
- Batched planner base heights publish into the base plane
- Removed the direct-mapped sparse base height memo
- Only bounds lattice biome reads stay out of the bake
- Memoize the last subterrain protection verdict in object destination transactions
- Key buffered cave object blocks by packed positions and check each position once at commit
- Build every free source plan before waiting on plans other threads are building
- Reuse TreeBlockMaterial values per block state
- Layer and generator programs sample single points through NoiseProgram.sample2D
- Scalar interpolator group means use the compiled programs when the seed matches
- Single-point program heights are property-tested against the generator path
- Add SectionBuffer: chunk palette of written instances and short[4096] ids per section in y, z, x order
- Column tops are indexed per x-slice and padded so fan-out slices do not share a cache line
- Add ColumnRunHunk and forward column runs through the listening hunk and block update listener
- Terrain painter emits column runs and evaluates ores only inside the column's ore bands
- Bukkit generation writes into SectionBuffer and applies it through ChunkDataOutput
- Remove ChunkDataHunkHolder and the probe's ProductionBlockHunk copy
- Probe production buffers use SectionBuffer
- Bake rotated block offsets, palette indexes, tiles and canopy bits per object and spin kernel
- Resolve decay, rotation, waterlog and air facts once per palette entry per placement
- Skip the destination read for waterloggable states that cannot become waterlogged
- Move SpinKernel to its own file
- Facade reads reuse the thread's last chunk entry instead of probing the bake map
- Stores and full-chunk fills refresh that entry from the map
- Surface lattice lookups reuse the previous point's cell indices
- Rarity stream picks are property-tested against the VolmLib rarity selection
- Pregen capacity growth scales the bake by the same factor as engine start
- Cell kernel passes fill a per-pass density lattice in field-major batches before classifying rows
- Lattice density columns are shared between profiles with identical density fields
- Warp samples are shared between profiles with the same warp field and batch along lattice columns
- Added lattice read, sample and warp counters
- Added bit-exact lattice column and field sharing tests
- Rarity selection streams pick from precomputed cumulative tables
- Implode and surface biome fixes take primitive coordinates
- Child selection reuses one derived child seed instead of a new RNG per level
- Base biome selection reads bridge and inferred streams directly
- Planes fill lazily per column with ready bits and batch only missing columns on full-chunk requests
- Natural fills batch only the base heights Terrain3D still needs and reuse the sparse memo
- Bounds lattice and hydrology planner reads stay out of the bake
- Bake capacity is eight times the noise cache, covering the measured working set
- Generator evaluation counters and a bake census print from the probe
- Parity test compares batched chunk base heights and evaluation counts with the scalar path
- Generation pool sized to performance cores
- Pregen burst raise sized from performance cores
- Hydrology planner pool sized to performance cores, at least four
- Compiled generator programs evaluate layer trees in batches through NoiseProgram
- TerrainProgram accumulates interpolator group means over chunk columns
- ChunkBakeCache holds compute-once per-chunk planes with provisional results never published
- Height, biome, region, rock, fluid and cave streams read the bake as thin facades
- Sparse hydrology and bounds reads stay scalar with a direct-mapped base height memo
- ColumnBake assembles id planes, heights, fluid surface, columns and the apron on demand
- Use the radial three-dimensional bound whenever rotateTowardsSlope is set, including placements whose configured rotation is disabled
- Group the support read margin helper with the other static factories
- Fell back to per-group grid sampling when a height sample nests inside another on the same thread
- Covered nested sampling with a bit-exact parity test
- Add PlacementReach: centered half-extent reach from loaded object keys, scale and shrink chains, enumerated rotation kernels, translate, warp and vacuum
- Size the object pass write radius and read radius from PlacementReach instead of full object width
- Size floating reach from scaled and shrunk object spans
- Count cave profile vacuum modes and upper-dimension effective rotation in the object reach
- Keep the transition-band footprint check on its existing footprint
- Add runner-backed and pack-wide reach tests
- Classify mixed cells without fade, boost or protection through a branch-light column loop
- Hoist the per-row bilinear terms shared by every column of a cell row
- Mark open cells from the pass bitset when every pass column is active
- Read interpolator corner bounds through a per-thread chunk block and skip groups whose cell corners are all zero
- Prefilled chunk context caches inline on generation threads with heights ahead of biomes
- Kept the burst-pool prefill only for the platform main thread, with heights and biomes in one task
- Painted surface fluid from the chunk context cache instead of re-sampling the fluid stream
- Move chunk generation and buffer selection into ProbeChunkGenerator
- Move measured-window stage and counter lines into ProbeWindowMetrics
- Move hydrology pre-planning into ProbeHydrologyPreplan
- Decide whole 8x8 adaptive cells as solid or open from lattice corner bounds with an ulp guard
- Evaluate only mixed cells per column with the original bilinear arithmetic
- Share the row kernel between serial and parallel adaptive classification
- Count solid, open and mixed cells and exact rows, printed by the generation probe
- Pin carve write sequences for eight carver configurations with golden hashes
- Replaced the barrier after every 8 component submissions with a per-caller cap that frees a slot as each component finishes and stops on the first failure
- Inline windows claim components without waiting and run components another generation holds after the rest of the pass
- Prefetched only the radius of passes that generate in the current phase
- Added straggler and held-claim tests and modeled claims in the locking chunk fixture
- Removed the unused decoration, derivative and identity streams and Engine.getBiomeID
- Skipped the shore-height noise when a column sits outside the proven shore band
- Dropped interpolator groups whose bounds are zero in every base-capable biome
- Stop writing cave ceiling markers, which nothing reads
- Write cave floor markers only when the dimension has cave spawners
- Reuse the zone floor subterrain cell for zone decoration
- Print measured-window stage totals from EngineMetrics as IRIS_GENPROBE_STAGES
- Time each context prefill task into its prefill timer
- Add gated generation counters for generator evaluations, corner starcasts and hydrology lookups
- Add -PprobeHydrologyPreplan to plan the probe area's hydrology tiles before warmup
- Add -PprobeHistoryRouter to generate through a generation-history router and registry contract
- Add -PprobeProductionBuffers to generate into production-equivalent block and biome hunks
- Print the mantle radius as IRIS_GENPROBE_MANTLE
- Place ellipsoid deposit clumps from the footprint cells instead of rebuilding the clump object
- Skip ore cave-biome lookups when no pack biome scales ore deposits
- Reject terrain-limited clumps before biome work when scaling cannot apply
- Compute the chunk terrain limit once per chunk
- Draw the exposure discard roll only when the discard chance is positive
