const MISMATCH_DIR_ENV: &str = "UNLIT3D_SNAPSHOT_MISMATCH_DIR";Expand description
The environment variable that collects mismatched snapshot frames.
Defined by unlit_wgpu_test_util for the host pass, and read by the Node
runner for the browser one — which is the process that can write, since the
page has no filesystem. Repeated here as a literal because this is a
separate crate that does not depend on the harness.