From 2ce39f3ad98fe855fb126dc29c82145751434421 Mon Sep 17 00:00:00 2001
From: Dave Parks <davep@lindenlab.com>
Date: Wed, 14 Sep 2022 16:24:20 -0500
Subject: SL-17701 Fix for shadow passes not respecting double sided and alpha
 parameters for PBR materials.

---
 indra/newview/llvovolume.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'indra/newview/llvovolume.cpp')

diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index b2365653ba..a02c18d99f 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -5539,6 +5539,14 @@ void LLVolumeGeometryManager::registerFace(LLSpatialGroup* group, LLFace* facep,
             draw_info->mNormalMap = vobj->getGLTFNormalMap(te);
             draw_info->mSpecularMap = vobj->getGLTFMetallicRoughnessMap(te);
             draw_info->mEmissiveMap = vobj->getGLTFEmissiveMap(te);
+            if (draw_info->mGLTFMaterial->mAlphaMode == LLGLTFMaterial::ALPHA_MODE_MASK)
+            {
+                draw_info->mAlphaMaskCutoff = gltf_mat->mAlphaCutoff * gltf_mat->mAlbedoColor.mV[3];
+            }
+            else
+            {
+                draw_info->mAlphaMaskCutoff = 1.f;
+            }
         }
         else if (mat)
 		{
-- 
cgit v1.2.3