HDR to SUN conversion is the process of transforming an image saved in the HDR (High Dynamic Range) raster format into the SUN (Sun Raster) image file format. This conversion maps HDR's wide luminance and color data into the encoding and palette/representation used by SUN raster files so the image can be opened by legacy SunOS, some Unix graphics tools, and compatible viewers.
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Read guide →Drag your .HDR file from your computer or use the browse function.
Confirm .sun as the selected destination format.
Click "Convert" and download your converted .SUN file once ready.
HDR files typically use the image/vnd.radiance MIME type and store high dynamic range images with extended color depth. SUN files are associated with certain rendering engines and may use proprietary codecs optimized for lighting data. Both formats serve specialized roles in visual computing and rendering pipelines.
The SUN (.SUN) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like HDR.
While specific technical details aren't available here, SUN files generally serve the purpose of storing image effectively within their domain.
Our online HDR to SUN converter allows you to effortlessly transform your HDR image files into the SUN format. Whether for rendering, visualization, or 3D applications, converting HDR files to SUN ensures compatibility and optimized performance. No downloads or installations required—just upload your HDR file and get a SUN file in seconds.
HDR files store high dynamic range imaging data primarily for photographic and visualization use, while SUN files are tailored for specific rendering engines requiring compatible lighting data. HDR provides a broader exposure range, whereas SUN focuses on optimized lighting representation in 3D environments. Conversion bridges the gap between general HDR imaging and SUN-specific applications.
Keep source HDR exposures reasonable: trim extremely large floating-point values or tone-map to preserve detail before conversion to SUN, which is typically limited to 8–32 bits per channel.
For best visual fidelity, convert HDR to a 24-bit or 32-bit SUN raster rather than an 8-bit indexed variant to avoid banding and color loss.
Batch conversion: process multiple HDR files with a script or batch tool and apply a consistent tone-mapping/profile to maintain uniform results across images.
File size guidance: SUN rasters are uncompressed by default; expect output files to be roughly width × height × bytes-per-pixel (e.g., ~3 MB per megapixel for 24-bit) unless RLE compression is used.
This HDR to SUN converter made my workflow so much smoother.
Alex P.
3D Artist
Fast, reliable, and preserves image quality perfectly.
Maria L.
Visualization Expert
A must-have tool for converting HDR files for rendering projects.
John D.
Architect
Start your free HDR to SUN conversion now.
Drag your file here to to upload.
Up to 250MB
Format limitations: SUN is an older, less expressive format—no native HDR floating-point support and limited color-profile metadata compared to modern formats like EXR or HDR TIFF.