{"record":{"id":"19b4d8e4c3170b85","repo":"BabylonJS/Babylon.js","slug":"could-not-load-a-native-cube-texture","errorCode":null,"errorMessage":"Could not load a native cube texture.","messagePattern":"Could not load a native cube texture\\.","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"packages/dev/core/src/Engines/Native/Extensions/nativeEngine.cubeTexture.pure.ts","lineNumber":94,"sourceCode":"                texture.type = Constants.TEXTURETYPE_UNSIGNED_BYTE;\r\n                texture.generateMipMaps = true;\r\n                texture.getEngine().updateTextureSamplingMode(Texture.TRILINEAR_SAMPLINGMODE, texture);\r\n                texture._isRGBD = true;\r\n                texture.invertY = true;\r\n\r\n                this._engine.loadCubeTextureWithMips(\r\n                    texture._hardwareTexture!.underlyingResource,\r\n                    imageData,\r\n                    false,\r\n                    texture._useSRGBBuffer,\r\n                    () => {\r\n                        texture.isReady = true;\r\n                        if (onLoad) {\r\n                            onLoad();\r\n                        }\r\n                    },\r\n                    () => {\r\n                        throw new Error(\"Could not load a native cube texture.\");\r\n                    }\r\n                );\r\n            };\r\n\r\n            if (buffer) {\r\n                onloaddata(buffer);\r\n            } else if (files && files.length === 6) {\r\n                throw new Error(`Multi-file loading not allowed on env files.`);\r\n            } else {\r\n                const onInternalError = (request?: IWebRequest, exception?: any) => {\r\n                    if (onError && request) {\r\n                        onError(request.status + \" \" + request.statusText, exception);\r\n                    }\r\n                };\r\n\r\n                this._loadFile(\r\n                    rootUrl,\r\n                    (data) => {\r","sourceCodeStart":76,"sourceCodeEnd":112,"githubUrl":"https://github.com/BabylonJS/Babylon.js/blob/0592b347b8a4ee0236089ea86a749cacfdb266d8/packages/dev/core/src/Engines/Native/Extensions/nativeEngine.cubeTexture.pure.ts#L76-L112","documentation":"The native cube texture loader wraps the actual texture upload in a callback pair; the error callback throws this error when the native engine fails to load the cube texture data. It means the native side rejected the buffer/URL — bad data, unsupported format, or an underlying load failure.","triggerScenarios":"Calling NativeEngine.createCubeTexture (via RegisterNativeEngineCubeTexture's onloaddata path) when the underlying native load call invokes its error callback — e.g. invalid or corrupt buffer, unsupported texture format, or native resource allocation failure.","commonSituations":"Passing a corrupted or wrong-format buffer (not a valid .env/DDS/KTX payload) to loadCubeTexture; file URL 404s or CORS-blocked so the downloaded data is unusable; native engine (Babylon Native on device) lacking codec/format support for the texture; out-of-memory on the device during upload.","solutions":["Verify the texture URL/buffer is valid: load the file directly, check response status 200 and correct content (valid .env/KTX/DDS header)","Log the underlying native error via onError/onInternalError callbacks passed to createCubeTexture to see the real cause","Re-encode the texture in a format supported by the target native platform (e.g. KTX2 with proper compression for the device GPU)","Check device memory and reduce texture resolution/mip count if the failure is an allocation problem"],"exampleFix":"// before\nconst tex = nativeEngine.createCubeTexture('assets/sky.env', scene); // silent failures\n// after\nconst tex = nativeEngine.createCubeTexture('assets/sky.env', scene, [], false,\n  () => console.log('cube texture loaded'),\n  (message, exception) => console.error('cube texture failed:', message, exception));\nconst res = await fetch('assets/sky.env');\nif (!res.ok) throw new Error(`cube texture fetch failed: ${res.status}`);","handlingStrategy":"try-catch","validationCode":"const res = await fetch(url);\nif (!res.ok) throw new Error(`cube texture ${url}: HTTP ${res.status}`);\nconst buf = await res.arrayBuffer();\nif (buf.byteLength < 16) throw new Error(`cube texture ${url}: file too small/corrupt`);","typeGuard":null,"tryCatchPattern":"try {\n  const tex = nativeEngine.createCubeTexture(url, scene, [], false, onLoad);\n} catch (e) {\n  if (e.message === 'Could not load a native cube texture.') {\n    console.error('Native cube texture load failed; check URL, format support and device memory');\n    // swap in fallback texture\n  } else { throw e; }\n}","preventionTips":["Pass onError callbacks to capture the underlying native failure reason","Validate texture URLs return 200 and correct bytes before loading","Encode textures in formats supported on all target native platforms (KTX2/basis)","Reduce resolution/mip chains on memory-constrained devices"],"tags":["texture","cube-texture","native-engine","asset-loading"],"backgroundTag":"native-texture-load-failed","analyzedSha":"0592b347b8a4ee0236089ea86a749cacfdb266d8","analyzedAt":"2026-08-30T15:11:20.442Z","schemaVersion":2},"datasetVersion":"2026-08-30T18:17:15.746Z"}