diff --git a/src/Engine.Graphics.Vulkan/Shaders/triangle.frag b/src/Engine.Graphics.Vulkan/Shaders/triangle.frag
index df0dba3..ab18a64 100644
--- a/src/Engine.Graphics.Vulkan/Shaders/triangle.frag
+++ b/src/Engine.Graphics.Vulkan/Shaders/triangle.frag
@@ -103,12 +103,12 @@ float calcShadow(vec3 worldPos, vec3 lightPos, vec3 N, vec3 L)
     // Base shadow check (center sample)
     float closestDepth = texture(shadowCube, dirNorm).r;
     float mappedDepth = closestDepth * FAR_PLANE;
-    float bias = 0.15;
+    float bias = 0.3 + 0.5 * (1.0 - max(dot(N, L), 0.0));
     float baseResult = dist - bias < mappedDepth ? 1.0 : 0.0;
 
     // If clearly lit or clearly shadowed, skip PCF
-    if (dist - bias * 4.0 < mappedDepth) return 1.0;
-    if (dist + bias * 4.0 > mappedDepth && baseResult > 0.5) return 1.0;
+    if (dist - bias * 3.0 < mappedDepth) return 1.0;
+    if (dist + bias * 3.0 > mappedDepth && baseResult > 0.5) return 1.0;
 
     // Poisson disk PCF — 16 samples
     float shadow = 0.0;
diff --git a/src/Engine.Graphics.Vulkan/Shaders/triangle.frag.spv b/src/Engine.Graphics.Vulkan/Shaders/triangle.frag.spv
index 9627afa..e6771f0 100644
Binary files a/src/Engine.Graphics.Vulkan/Shaders/triangle.frag.spv and b/src/Engine.Graphics.Vulkan/Shaders/triangle.frag.spv differ
diff --git a/src/Engine.Graphics.Vulkan/VulkanRenderer.cs b/src/Engine.Graphics.Vulkan/VulkanRenderer.cs
index b8ad9c2..402b1ab 100644
--- a/src/Engine.Graphics.Vulkan/VulkanRenderer.cs
+++ b/src/Engine.Graphics.Vulkan/VulkanRenderer.cs
@@ -255,7 +255,7 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
             };
             Vk.vkCmdSetScissor(cmd, 0, 1, &shadowScissor);
 
-            Vk.vkCmdSetDepthBias(cmd, 1.25f, 0.0f, 1.75f);
+            Vk.vkCmdSetDepthBias(cmd, 2.5f, 0.0f, 3.5f);
 
             foreach (var dc in drawCalls)
             {