{"record":{"id":"b8e4ac95ea71c3a0","repo":"BabylonJS/Babylon.js","slug":"unable-to-create-vertex-buffer","errorCode":null,"errorMessage":"Unable to create vertex buffer","messagePattern":"Unable to create vertex buffer","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"critical","filePath":"packages/dev/core/src/Engines/thinEngine.pure.ts","lineNumber":1316,"sourceCode":"        this._cachedVertexBuffers = null;\r\n    }\r\n\r\n    /**\r\n     * Creates a vertex buffer\r\n     * @param data the data or size for the vertex buffer\r\n     * @param _updatable whether the buffer should be created as updatable\r\n     * @param _label defines the label of the buffer (for debug purpose)\r\n     * @returns the new WebGL static buffer\r\n     */\r\n    public createVertexBuffer(data: DataArray | number, _updatable?: boolean, _label?: string): DataBuffer {\r\n        return this._createVertexBuffer(data, this._gl.STATIC_DRAW);\r\n    }\r\n\r\n    private _createVertexBuffer(data: DataArray | number, usage: number): DataBuffer {\r\n        const vbo = this._gl.createBuffer();\r\n\r\n        if (!vbo) {\r\n            throw new Error(\"Unable to create vertex buffer\");\r\n        }\r\n\r\n        const dataBuffer = new WebGLDataBuffer(vbo);\r\n        this.bindArrayBuffer(dataBuffer);\r\n\r\n        if (typeof data !== \"number\") {\r\n            if (data instanceof Array) {\r\n                this._gl.bufferData(this._gl.ARRAY_BUFFER, new Float32Array(data), usage);\r\n                dataBuffer.capacity = data.length * 4;\r\n            } else {\r\n                this._gl.bufferData(this._gl.ARRAY_BUFFER, <ArrayBuffer>data, usage);\r\n                dataBuffer.capacity = data.byteLength;\r\n            }\r\n        } else {\r\n            this._gl.bufferData(this._gl.ARRAY_BUFFER, new Uint8Array(data), usage);\r\n            dataBuffer.capacity = data;\r\n        }\r\n\r","sourceCodeStart":1298,"sourceCodeEnd":1334,"githubUrl":"https://github.com/BabylonJS/Babylon.js/blob/0592b347b8a4ee0236089ea86a749cacfdb266d8/packages/dev/core/src/Engines/thinEngine.pure.ts#L1298-L1334","documentation":"Thrown by the private _createVertexBuffer when gl.createBuffer() returns null, meaning the WebGL driver could not allocate a new buffer object for vertex data. This is a GPU/driver resource allocation failure, not a data problem.","triggerScenarios":"gl.createBuffer() returning null due to exhausted GPU memory, a lost WebGL context, or exceeding the driver's buffer-object limit when creating vertex buffers via createVertexBuffer / updateVertexBuffer pathways.","commonSituations":"Large scenes exhausting GPU memory (many meshes, high-poly geometry); running on integrated GPUs with little VRAM; creating buffers after context loss; leaking buffers by never disposing old geometry in dynamic streaming scenarios.","solutions":["Check gl.isContextLost(); if lost, handle context restoration (recreate engine/scene)","Reduce vertex data memory: dispose unused meshes/buffers, use smaller vertex formats (e.g. Float32 -> Int16 where possible)","Retry buffer creation after freeing GPU resources (engine.disposeUnusedTextures / disposing meshes)","Monitor memory during development with engine.getGlInfo and browser GPU diagnostics"],"exampleFix":"// before\nconst vb = new VertexBuffer(engine, hugeFloat32Array, 'position'); // OOM on low-VRAM GPUs\n// after\nmesh.geometry.releaseVertexBuffer('position'); // free old buffers before allocating\nconst vb = new VertexBuffer(engine, downgradedData, 'position');","handlingStrategy":"validation","validationCode":"function canAllocateBuffer(gl: WebGLRenderingContext): boolean {\n  return !gl.isContextLost() && gl.getError() === gl.NO_ERROR;\n}","typeGuard":"null","tryCatchPattern":"try {\n  const buffer = engine.createVertexBuffer(data);\n} catch (e) {\n  if ((e as Error).message === 'Unable to create vertex buffer') {\n    disposeHeavyAssets(); // free GPU memory then retry\n  } else throw e;\n}","preventionTips":["Dispose geometries/textures you no longer use; call mesh.dispose() on removal","Track approximate GPU memory usage of buffers in your scene manager","Prefer smaller vertex formats (normalized bytes over floats) where possible","Watch for context-lost events; they often precede allocation failures"],"tags":["webgl","gpu-memory","buffer"],"backgroundTag":"gpu-out-of-memory","analyzedSha":"0592b347b8a4ee0236089ea86a749cacfdb266d8","analyzedAt":"2026-08-30T15:11:20.442Z","schemaVersion":2},"datasetVersion":"2026-08-30T18:17:15.746Z"}