diff --git a/include/boo/graphicsdev/IGraphicsDataFactory.hpp b/include/boo/graphicsdev/IGraphicsDataFactory.hpp
index 42bddb2..46080d1 100644
--- a/include/boo/graphicsdev/IGraphicsDataFactory.hpp
+++ b/include/boo/graphicsdev/IGraphicsDataFactory.hpp
@@ -198,6 +198,7 @@ enum class ZTest
     None,
     LEqual, /* Flipped on Vulkan, D3D, Metal */
     Greater,
+    GEqual,
     Equal
 };
 
diff --git a/lib/graphicsdev/D3D11.cpp b/lib/graphicsdev/D3D11.cpp
index b4d5dad..8bbe2d7 100644
--- a/lib/graphicsdev/D3D11.cpp
+++ b/lib/graphicsdev/D3D11.cpp
@@ -564,6 +564,9 @@ class D3D11ShaderPipeline : public IShaderPipeline
         case ZTest::Greater:
             dsDesc.DepthFunc = D3D11_COMPARISON_LESS;
             break;
+        case ZTest::GEqual:
+            dsDesc.DepthFunc = D3D11_COMPARISON_LESS_EQUAL;
+            break;
         case ZTest::Equal:
             dsDesc.DepthFunc = D3D11_COMPARISON_EQUAL;
             break;
diff --git a/lib/graphicsdev/D3D12.cpp b/lib/graphicsdev/D3D12.cpp
index 6506cca..0c83df5 100644
--- a/lib/graphicsdev/D3D12.cpp
+++ b/lib/graphicsdev/D3D12.cpp
@@ -720,6 +720,9 @@ class D3D12ShaderPipeline : public IShaderPipeline
         case ZTest::Greater:
             desc.DepthStencilState.DepthFunc = D3D12_COMPARISON_FUNC_LESS;
             break;
+        case ZTest::GEqual:
+            desc.DepthStencilState.DepthFunc = D3D12_COMPARISON_FUNC_LESS_EQUAL;
+            break;
         case ZTest::Equal:
             desc.DepthStencilState.DepthFunc = D3D12_COMPARISON_FUNC_EQUAL;
             break;
diff --git a/lib/graphicsdev/GL.cpp b/lib/graphicsdev/GL.cpp
index 5f1af87..991f21a 100644
--- a/lib/graphicsdev/GL.cpp
+++ b/lib/graphicsdev/GL.cpp
@@ -503,6 +503,9 @@ public:
             case ZTest::Greater:
                 glDepthFunc(GL_GREATER);
                 break;
+            case ZTest::GEqual:
+                glDepthFunc(GL_GEQUAL);
+                break;
             case ZTest::Equal:
                 glDepthFunc(GL_EQUAL);
                 break;
diff --git a/lib/graphicsdev/Metal.mm b/lib/graphicsdev/Metal.mm
index a18bb1d..3ecf49f 100644
--- a/lib/graphicsdev/Metal.mm
+++ b/lib/graphicsdev/Metal.mm
@@ -656,6 +656,9 @@ class MetalShaderPipeline : public IShaderPipeline
         case ZTest::Greater:
             dsDesc.depthCompareFunction = MTLCompareFunctionLess;
             break;
+        case ZTest::GEqual:
+            dsDesc.depthCompareFunction = MTLCompareFunctionLessEqual;
+            break;
         case ZTest::Equal:
             dsDesc.depthCompareFunction = MTLCompareFunctionEqual;
             break;