started working on fog darkness

src/shaders/light_cone.gdshader

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+shader_type canvas_item;
+
+uniform float cone_angle : hint_range(0.0, 3.14) = 0.8; // Total width of beam
+uniform float direction_degrees : hint_range(0.0, 360.0) = 0.0;
+uniform float feather : hint_range(0.0, 1.0) = 0.05;
+
+void fragment() {
+    // 1. Get the UVs centered at (0.5, 0.5)
+    vec2 uv = UV - vec2(0.5);
+    
+    // 2. Calculate the current pixel angle
+    // atan2 returns values from -PI to PI
+    float pixel_angle = atan(uv.y, uv.x);
+    
+    // 3. Convert uniform direction to radians
+    float target_rad = radians(direction_degrees);
+    
+    // 4. Calculate difference between angles (wrapped)
+    float angle_diff = abs(atan(sin(pixel_angle - target_rad), cos(pixel_angle - target_rad)));
+    
+    // 5. Create the cone mask
+    // We compare the difference to half the cone angle
+    float half_cone = cone_angle * 0.5;
+    float mask = 1.0 - smoothstep(half_cone - feather, half_cone, angle_diff);
+    
+    // 6. Apply mask to the texture
+    vec4 tex_color = texture(TEXTURE, UV);
+    COLOR = vec4(tex_color.rgb, tex_color.a * mask);
+}

src/shaders/light_cone.gdshader.uid

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+uid://ce7sy7vkt3qr2