diff --git a/equirectangular/license.txt b/equirectangular/license.txt
new file mode 100644
index 0000000..e40b5b8
--- /dev/null
+++ b/equirectangular/license.txt
@@ -0,0 +1,4 @@
+source link: https://www.hqreslib.com
+    license: CY-BY
+
+This license allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use.
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