[Examples] Minor update in EampleBase and PBR example.

- Added report output to ExampleBase to log failure reason when render system could not be loaded.
- Lowered GLSL version in PBR example from 450 to 410 to make it work on Mac.

examples/Cpp/ExampleBase/ExampleBase.cpp

@@ -523,13 +523,15 @@ ExampleBase::ExampleBase(const LLGL::UTF8String& title)
  }
 
  // Create render system
+ LLGL::Report report;
  rendererDesc.flags |= g_Config.flags;
- renderer = LLGL::RenderSystem::Load(rendererDesc);
+ renderer = LLGL::RenderSystem::Load(rendererDesc, &report);
 
  // Fallback to null device if selected renderer cannot be loaded
  if (!renderer)
  {
  LLGL::Log::Errorf("Failed to load \"%s\" module. Falling back to \"Null\" device.\n", rendererDesc.moduleName.c_str());
+ LLGL::Log::Errorf("Reason for failure: %s", report.HasErrors() ? report.GetText() : "Unknown\n");
  renderer = LLGL::RenderSystem::Load("Null");
  if (!renderer)
  {

examples/Cpp/PBR/Example.Mesh.frag

@@ -1,6 +1,6 @@
 // PBR GLSL Mesh Fragment Shader
 
-#version 450 core
+#version 410 core
 
 #define M_PI 3.141592654
 

examples/Cpp/PBR/Example.Mesh.vert

@@ -1,6 +1,6 @@
 // PBR GLSL Mesh Vertex Shader
 
-#version 450 core
+#version 410 core
 
 uniform Settings
 {

examples/Cpp/PBR/Example.Sky.frag

@@ -1,6 +1,6 @@
 // PBR GLSL Skybox Fragment Shader
 
-#version 450 core
+#version 410 core
 
 uniform Settings
 {

examples/Cpp/PBR/Example.Sky.vert

@@ -1,6 +1,6 @@
 // PBR GLSL Skybox Vertex Shader
 
-#version 450 core
+#version 410 core
 
 uniform Settings
 {

examples/Cpp/PBR/Example.metal

@@ -189,7 +189,9 @@ float3 BRDF(
 
  float3 color = (diffuse + specular) * NdotL;
 
- //color += SampleEnvironment(envMap, envMapLayer, smpl, roughness, reflection) * 0.2;
+ // Sample incoming light from environment map
+ float3 reflection = -normalize(reflect(viewDir, normal));
+ color += SampleEnvironment(envMap, envMapLayer, smpl, roughness, reflection) * 0.2;
 
  return color;
 }