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-rw-r--r--indra/newview/app_settings/shaders/class1/environment/encodeNormF.glsl3
1 files changed, 3 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class1/environment/encodeNormF.glsl b/indra/newview/app_settings/shaders/class1/environment/encodeNormF.glsl
index 50e781fa78..6cd2445522 100644
--- a/indra/newview/app_settings/shaders/class1/environment/encodeNormF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/encodeNormF.glsl
@@ -23,6 +23,9 @@
* $/LicenseInfo$
*/
+// Lambert Azimuthal Equal-Area projection
+// See: https://aras-p.info/texts/CompactNormalStorage.html
+// Also see: A_bit_more_deferred_-_CryEngine3.ppt
vec2 encode_normal(vec3 n)
{
float f = sqrt(8 * n.z + 8);