Cubemap to Equirectangular 360 Converter
Stitch six cubic environment faces or horizontal skybox strips into a seamless 2:1 spherical equirectangular panorama with bilinear seam smoothing and real-time 3D WebGL preview.
Direct Answer & Pipeline Overview
Cubemap to Equirectangular 360 Converter is a specialized, 100% client-side engineering utility developed by Atlyxen Studios. It processes calculations and conversions directly inside your browser memory using hardware-accelerated WebAssembly and WebGL, guaranteeing instant results with zero server file transfers and zero data retention.
How to Use the Cubemap to Equirectangular 360 Converter
Upload 6 Faces or Select Preset
Attach your 6 square cube faces, drag and drop all files at once for auto-detection, or click a preset.
Configure Output Resolution
Choose your desired output resolution (1K, 2K, or 4K) and toggle Bilinear Filtering for seamless edges.
Preview in 3D WebGL Viewport
Click and drag in the interactive 3D environment viewer to inspect the stitched 360 skybox from the inside.
Download 360 Panorama
Export your seamless 2:1 equirectangular PNG ready for Blender, Unreal Engine, Unity, or VR headsets.
Key Technical Capabilities
Assemble 6 separate cube faces (+X, -X, +Y, -Y, +Z, -Z) with intelligent filename auto-detection
Support for 6:1 horizontal skybox strips and cross layout imports
Bilinear interpolation filtering to eliminate jagged seams along cube edge boundaries
Interactive 3D WebGL spherical environment viewport allowing you to look around inside the panorama
Selectable output resolutions: 1K, 2K, and 4K standard 2:1 equirectangular PNGs
Instant presets: Sunset Horizon and Cyberpunk Studio for immediate one-click testing
100% client-side processing in browser RAM with zero server uploads
Frequently Asked Questions
What is an equirectangular 360 panorama image?
An equirectangular image is a 2:1 aspect ratio panoramic projection where the horizontal axis maps directly to 360 degrees of longitude (azimuth) and the vertical axis maps to 180 degrees of latitude (elevation). It is the universal standard format used by VR headsets, YouTube 360, Facebook 360, and 3D game engines.
What order are the six cubemap faces in?
Standard OpenGL / DirectX cubemaps consist of: +X (Right), -X (Left), +Y (Top / Zenith), -Y (Bottom / Nadir), +Z (Front), and -Z (Back). Our tool includes an intelligent filename detector that recognizes names like `posx`, `px`, `right`, `top`, `front`, etc., to assign faces automatically.
How does bilinear filtering prevent visible seams?
Nearest-neighbor sampling maps rays to discrete integer pixels, causing staircasing and visible discontinuities along cube edges. Bilinear filtering calculates a weighted average of the four surrounding texels, producing continuous color transitions across cube boundaries.
Can I use the exported 360 panorama as an HDRI environment in Blender?
Yes. In Blender Cycles or EEVEE, go to World Properties, add an Environment Texture node, select your downloaded 2:1 PNG panorama, and connect it to the Background shader.
Are my private skybox textures sent to an external server?
No. All pixel sampling, spherical mathematical remapping, and WebGL rendering occur entirely in your local browser memory. No images or files are ever transmitted over the network.