diff --git a/BlueMapCore/src/main/webroot/js/libs/shaders/HiresVertexShader.js b/BlueMapCore/src/main/webroot/js/libs/shaders/HiresVertexShader.js
index 0feab341..e0f1cfe1 100644
--- a/BlueMapCore/src/main/webroot/js/libs/shaders/HiresVertexShader.js
+++ b/BlueMapCore/src/main/webroot/js/libs/shaders/HiresVertexShader.js
@@ -25,6 +25,7 @@
 import { ShaderChunk } from 'three';
 
 const HIRES_VERTEX_SHADER = `
+#define EPSILON 1e-6
 ${ShaderChunk.logdepthbuf_pars_vertex}
 
 attribute float ao;
diff --git a/BlueMapCore/src/main/webroot/js/libs/shaders/LowresVertexShader.js b/BlueMapCore/src/main/webroot/js/libs/shaders/LowresVertexShader.js
index ae9a4485..8cd668f5 100644
--- a/BlueMapCore/src/main/webroot/js/libs/shaders/LowresVertexShader.js
+++ b/BlueMapCore/src/main/webroot/js/libs/shaders/LowresVertexShader.js
@@ -25,6 +25,7 @@
 import { ShaderChunk } from 'three';
 
 const LOWRES_VERTEX_SHADER = `
+#define EPSILON 1e-6
 ${ShaderChunk.logdepthbuf_pars_vertex}
 
 varying vec3 vPosition;