diff --git a/testsuite/render-microfacet/ref/out-linux2-alt.exr b/testsuite/render-microfacet/ref/out-linux2-alt.exr new file mode 100644 index 000000000..e1b07b6e9 Binary files /dev/null and b/testsuite/render-microfacet/ref/out-linux2-alt.exr differ