diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl
index 8cb56fbc831..f0fb31a4579 100644
--- a/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl
+++ b/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl
@@ -524,7 +524,7 @@ vec4 fog_process(vec3 vertex) {
 		}
 	}
 
-	float fog_amount = 1.0 - exp(min(0.0, vertex.z * scene_data.fog_density));
+	float fog_amount = 1.0 - exp(min(0.0, -length(vertex) * scene_data.fog_density));
 
 	if (abs(scene_data.fog_height_density) > 0.001) {
 		float y = (scene_data.camera_matrix * vec4(vertex, 1.0)).y;
diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
index c3c41394507..750ec5f00a7 100644
--- a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
+++ b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
@@ -550,7 +550,7 @@ vec4 fog_process(vec3 vertex) {
 		}
 	}
 
-	float fog_amount = 1.0 - exp(min(0.0, vertex.z * scene_data.fog_density));
+	float fog_amount = 1.0 - exp(min(0.0, -length(vertex) * scene_data.fog_density));
 
 	if (abs(scene_data.fog_height_density) > 0.001) {
 		float y = (scene_data.camera_matrix * vec4(vertex, 1.0)).y;