6000.6.0a3

Alpha · Released Apr 15, 2026 · Changeset 93858bc74878 · 19 release notes

Unity release pageRelease notes (markdown) Open in Unity Hub
53build score
Upgrade risk+27Net cleanup+14Live debt+13
cohort: alpha (29)
How this number is computed

Composite = sum of sub_score × weight across six metrics. Sub-scores are percentile-rank(log1p(min(raw, p95))) within the alpha cohort (29 releases). Sub-scores for lower-is-better metrics are flipped to 100 − percentile.

Sub-scoreFormulaRawClip%ileWeightScoreContrib
Breaking surface(breaking_change + api_change) / total_notes0.0580.0585725%4310.8
Blocker rateblockers / total_notes6.5e-36.5e-35315%477.0
Mobile riskmobile_known_issues / total_notes001210%888.8
Fix densityfixes / total_notes0.6630.6632215%223.4
Net-fix delta((fixes − known_issues) − prior.(fixes − known_issues)) / total_notes0.2390.2397215%7210.8
Known-issue debtknown_issues / total_notes0.0160.0163620%6412.8
Composite53

* = raw value was clipped at the cohort 95th percentile to prevent outliers from compressing everyone else's scores. Sub-scores marked "med" substitute the cohort median where the input was missing (e.g. first patch on a minor line has no prior patch for net-fix delta).

6000.2.0a10: Crash on TexturesD3D12::CreateTextureInternal() when opening a project for the first time
Known IssuesKnown issueBlockerUUM-135024
6000.3.0a3: Crash on Umbra::QueryExt::queryStaticShadowCasters when baking a custom Reflection Probe with the minimum Near Clipping Planes value
Known IssuesKnown issueBlocker
6000.4.0a4: Crash on core::base_hash_set when building a specific project
Known IssuesKnown issueBlockerUUM-139283
Crash on xatlas::internal::pack::Atlas::findChartLocation_bruteForce when generating the lighting
6000.5.0a8,6000.6.0a1,6000.4.0b12,6000.3.12f1Known issueBlockerUUM-139715
Performed periodic full flushes when too many command buffers were pending. (UUM-138597) Fixed in 6000.6.0a4.
DX12Known issueBlockerUUM-138597
Fixed a bug where meshes with unreferenced vertex positions would sometimes cause crashes during baking, when using the xAtlas packer. (UUM-138494) Fixed in 6000.6.0a4.
GIKnown issueBlockerUUM-138494
Crash on "core::base_hash_set" when using nested [SerializeReference] fields in List<T> structures
Known IssuesKnown issueBlockerUUM-139722
Crash on ConstraintProjectionTree::projectionTreeBuildStep when ConfigurableJoint uses JointProjectionMode.PositionAndRotation and connected Rigidbody switches from kinematic to non-kinematic
Known IssuesKnown issueBlockerUUM-135394

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