Fix the height fog effect

2 files changed, 6 insertions, 6 deletions

diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl
index f0fb31a457..b3d106e47d 100644
--- a/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl
+++ b/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl
@@ -526,12 +526,12 @@ vec4 fog_process(vec3 vertex) {
 
 	float fog_amount = 1.0 - exp(min(0.0, -length(vertex) * scene_data.fog_density));
 
-	if (abs(scene_data.fog_height_density) > 0.001) {
+	if (abs(scene_data.fog_height_density) >= 0.0001) {
 		float y = (scene_data.camera_matrix * vec4(vertex, 1.0)).y;
 
-		float y_dist = scene_data.fog_height - y;
+		float y_dist = y - scene_data.fog_height;
 
-		float vfog_amount = clamp(exp(y_dist * scene_data.fog_height_density), 0.0, 1.0);
+		float vfog_amount = clamp(1.0 - exp(y_dist * scene_data.fog_height_density), 0.0, 1.0);
 
 		fog_amount = max(vfog_amount, fog_amount);
 	}
diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
index 750ec5f00a..d0918994af 100644
--- a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
+++ b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
@@ -552,12 +552,12 @@ vec4 fog_process(vec3 vertex) {
 
 	float fog_amount = 1.0 - exp(min(0.0, -length(vertex) * scene_data.fog_density));
 
-	if (abs(scene_data.fog_height_density) > 0.001) {
+	if (abs(scene_data.fog_height_density) >= 0.0001) {
 		float y = (scene_data.camera_matrix * vec4(vertex, 1.0)).y;
 
-		float y_dist = scene_data.fog_height - y;
+		float y_dist = y - scene_data.fog_height;
 
-		float vfog_amount = clamp(exp(y_dist * scene_data.fog_height_density), 0.0, 1.0);
+		float vfog_amount = clamp(1.0 - exp(y_dist * scene_data.fog_height_density), 0.0, 1.0);
 
 		fog_amount = max(vfog_amount, fog_amount);
 	}