From 3971d922337a72a1afccc436fcfc2c4b4c68b2d2 Mon Sep 17 00:00:00 2001
From: Matt Pharr <matt@pharr.org>
Date: Sat, 24 Apr 2021 11:20:40 -0700
Subject: [PATCH] Fix bug in isInterface() lambda in
 de901103e26efe1fb5e9fcaf9d1f9dc3261e04ec

---
 src/pbrt/gpu/pathintegrator.cpp | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/pbrt/gpu/pathintegrator.cpp b/src/pbrt/gpu/pathintegrator.cpp
index fe62823..b797403 100644
--- a/src/pbrt/gpu/pathintegrator.cpp
+++ b/src/pbrt/gpu/pathintegrator.cpp
@@ -122,19 +122,18 @@ GPUPathIntegrator::GPUPathIntegrator(Allocator alloc, const ParsedScene &scene)
             continue;
 
         auto isInterface = [&]() {
-            const SceneEntity *mtl = nullptr;
+            std::string materialName;
             if (shape.materialIndex != -1)
-                mtl = &scene.materials[shape.materialIndex];
+                materialName = scene.materials[shape.materialIndex].name;
             else {
                 for (auto iter = scene.namedMaterials.begin();
                      iter != scene.namedMaterials.end(); ++iter)
                     if (iter->first == shape.materialName) {
-                        mtl = &iter->second;
+                        materialName = iter->second.parameters.GetOneString("type", "");
                         break;
                     }
-                CHECK(mtl != nullptr);
             }
-            return (mtl->name == "interface" || mtl->name == "none" || mtl->name.empty());
+            return (materialName == "interface" || materialName == "none" || materialName.empty());
         };
         if (isInterface())
             continue;
-- 
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