295354 2025-07-02 13:45:40 -0700 [HDR] HDR AVIF gain map does not render properly 2025-07-02 14:42:28 -0700 1 1 1 Unclassified WebKit Images WebKit Nightly Build Unspecified Unspecified RESOLVED MOVED InRadar P2 Normal --- 282299 1 sabouhallawa webkit-unassigned greg323464 sabouhallawa webkit-bug-importer oldest_to_newest 2127384 0 sabouhallawa 2025-07-02 13:45:40 -0700 1. Install macOS Tahoe 2. Open https://gregbenzphotography.com/hdr/#tests 3. Look for test #8c. Result: The HDR image looks distorted. Expected: It should show an image with text saying the browser supports AVIF ISO gain map images. 2127385 1 sabouhallawa 2025-07-02 13:46:17 -0700 rdar://154351676 2127386 2 sabouhallawa 2025-07-02 13:49:10 -0700 This is an issue below WebKit, tracked by Apple internally as rdar://154351676.