SGI to JPG

How to do it

1. Download Asteria and open it. It's free and needs no account.
2. Drop your SGI files onto its window, or press ⌘O (Ctrl O on Windows) to choose them. Drop as many as you like.
3. Type convert to jpegand press Enter. JPEG from PSD, TGA, ICO, EXR and similar.
4. The first time, Asteria asks to download ImageMagick, a free add-on from ImageMagick Studio, under the ImageMagick license. It shows the download size before you say yes, and needs no administrator password. On Mac, it opens ImageMagick's official download page instead, and finds it once it is installed.
5. Press ⌘↵ (Ctrl ↵ on Windows) to save. The JPG files appear next to the originals, which stay exactly as they were.

What it needs

SGI to JPG uses ImageMagick, a free program for camera RAW and rare image formats. Asteria doesn't bundle it. The first time you need it, Asteria offers to download it, checks the download against a pinned checksum, and keeps it in its own folder, where Settings can remove it again. If ImageMagick is already on your computer, Asteria uses that copy.

How it was tested

A real SGI file was converted on macOS on Apple silicon and Linux, and the JPG that came out was opened and checked with ImageMagick identify to make sure it is what it says it is.