[bkaradzic-microsoft]

Updates the Babylon.js npm packages from 9.29.0 to 9.31.3, the latest published version. This picks up BabylonJS/Babylon.js#19005 ([Native] NativeEngine rendering parity).

• Apps/package.json: the eight runtime babylonjs* packages.
• Apps/UnitTests/JavaScript/package.json: babylonjs, babylonjs-materials, @babylonjs/core, @babylonjs/materials.
• Apps/package-lock.json: regenerated with npm install --package-lock-only. Only the Babylon.js entries change.

No reference images change. Babylon.js changed none of the reference images or test entries BN uses between 9.29.0 and 9.31.3.

Validation tests

Apps/Playground/Scripts/config.json enables 173 of the 249 tests that had excludeFromAutomaticTesting, raising enabled tests from 471 to 644 (5 of them, the IBL Voxel/Screen-space Shadowing tests, are excluded on D3D11; see below). Each excluded test was run on its own on Win32 D3D11 V8, and the ones that passed are enabled.

Enabled tests by previous exclusion reason:

Previous reason	Tests
Pixel comparison fails (more than 20% pixels differ)	103
GPUParticleSystem ARRAY_BUFFER TypeError	34
Test crashes or hangs	20
CDF renderer / IBL prefiltering FLOAT undefined	6
Other (missing Image, cubemap load, texture formats, asset loads, FrameGraph hang, and others)	10

3 tests pass on their own but fail pixel comparison when they run after other tests in the same process, so they stay excluded with an updated reason: Order independent transparency (fails after Reverse depth buffer and CSM shadows), Command encoder order in WebGPU 1, and OpenPBR Thin Walled Subsurface Transmission Blending - IBL.

Runner fix: reset stencil state between tests

cube-with-holes-using-stencil-buffer sets the stencil function, mask, and operations directly on the engine. cleanupAfterTest in validation_native.js only called setStencilBuffer(false), so the rest leaked into later tests and broke both FrameGraph (nrge) highlight layer tests. Cleanup now restores the full StencilState defaults, and those two tests are enabled.

OpenGL exclusions

76 of the enabled tests fail on Ubuntu JSC (Mesa llvmpipe), so they get "excludedGraphicsApis": ["OpenGL"] with a reason. They were checked one by one in an Ubuntu 24.04 environment that matches the CI runner.

OpenGL failure	Tests
Particle shader Error compiling effect	38
4x MSAA render target format not supported	21
llvmpipe crash (LLVM ERROR: Cannot emit physreg copy instruction, SSAO)	7
Pixel comparison fails (3.4–4.4%)	4
Motion blur instances (4.7–10.7%)	3
No depth/stencil format	2
Timeout	1

Win32 CI hang: device loss on WARP

The Win32 V8 job hung on GitHub's GPU-less runners, where D3D11 runs on the WARP software rasterizer. A hang dump showed m_deviceLost = true with every thread idle. The IBL Voxel Shadowing and IBL Screen-space Shadowing tests remove the device (DXGI_ERROR_DEVICE_REMOVED) on that WARP. Every later test then failed its readback with operation canceled until one waited forever. Locally, under WARP on Windows 11, these tests pass.

• config.json: the five IBL Voxel/Screen-space Shadowing tests are excluded on D3D11 only. They still run on OpenGL.
• validation_native.js: once a framebuffer readback is canceled, the runner reports the test that was running and stops the run with a failure, instead of continuing on a lost device.

Local results: Win32 D3D11 V8 644/644, run as two processes (323/323 + 321/321; also the first half under WARP: 323/323); Ubuntu 24.04 JSC OpenGL 517/517.

In one process, test memory growth (~20 MB per test) reaches ~8 GB near the end of the Win32 suite. That is not addressed in this PR.

[Copilot]

🔵 Needs a closer look

The dependency updates are consistent, but the upstream NativeEngine rendering changes need integration validation against Babylon Native before approval.

No open issues 🎉

1 file not reviewed

• Apps/package-lock.json: Generated file

What changed in this PR

Updates Babylon.js from 9.29.0 to 9.31.3 across the applications and JavaScript unit tests to pick up upstream NativeEngine rendering parity improvements.

Changes:

• Updates eight runtime packages and four unit-test dependencies.
• Synchronizes Babylon.js versions, package URLs, and integrity hashes in the shared lockfile without unrelated dependency changes.

File	Description
Apps/​UnitTests/​JavaScript/​package.json	Updates Babylon.js test dependencies to 9.31.3.
Apps/​package.json	Updates eight Babylon.js runtime dependencies to 9.31.3.
Apps/​package-lock.json	Locks the updated packages and synchronizes workspace declarations.

_{Review effort: Balanced}

[bghgary]

[Reviewed by Copilot on behalf of @bghgary]

LGTM.