How to Convert Multiple CR3 Images to IGS?
1. Download and Install reaConverter
reaConverter is a standalone Windows app — download, install, and start converting CR3 files in under two minutes. reaConverter also includes editing tools: resize, crop, rotate, and more.
2. Load your CR3 files
Load your CR3 RAW photos into reaConverter. Add entire shoots at once and process them in minutes.
Browse for files, drag them in, or add entire folders at once. reaConverter queues everything automatically.
3. Select IGS as output format
Choose IGS as output format. Adjust color profile, quality, and resolution settings to match your photography workflow.
4. Start CR3 to IGS conversion
Start the conversion with one click. reaConverter handles everything and notifies you when it's done.
When the batch finishes, your IGS files are ready in the destination folder you chose earlier.
How CR3 and IGS differ in practice
CR3 files hold unprocessed sensor data, so white balance and exposure are still adjustable. Converting to IGS bakes those decisions into the pixels, and highlight recovery is no longer available afterwards. Set white balance and exposure before the run rather than after. CR3 is made of pixels and IGS is a geometry format, so the two describe images in fundamentally different ways. Check the result before sending it downstream: what matters is whether the output contains editable geometry or a picture placed inside a IGS container, and that determines whether a CAD or design tool can work with it.
