diff --git a/blade-helpers/src/lib.rs b/blade-helpers/src/lib.rs
index 9e3f2bfe..db7f2ec8 100644
--- a/blade-helpers/src/lib.rs
+++ b/blade-helpers/src/lib.rs
@@ -6,3 +6,18 @@ mod hud;
 pub use blade_render::Camera;
 pub use camera::ControlledCamera;
 pub use hud::{populate_debug_selection, ExposeHud};
+
+pub fn default_ray_config() -> blade_render::RayConfig {
+    blade_render::RayConfig {
+        num_environment_samples: 1,
+        environment_importance_sampling: false,
+        temporal_tap: true,
+        temporal_history: 10,
+        spatial_taps: 1,
+        spatial_tap_history: 10,
+        spatial_radius: 20,
+        t_start: 0.01,
+        pairwise_mis: true,
+        defensive_mis: 0.1,
+    }
+}
diff --git a/blade-render/code/gbuf.inc.wgsl b/blade-render/code/gbuf.inc.wgsl
index 374aa708..1f4d84a1 100644
--- a/blade-render/code/gbuf.inc.wgsl
+++ b/blade-render/code/gbuf.inc.wgsl
@@ -1,3 +1,5 @@
+#use DEBUG_MODE
+
 const MOTION_SCALE: f32 = 0.02;
 const USE_MOTION_VECTORS: bool = true;
-const WRITE_DEBUG_IMAGE: bool = false;
+const WRITE_DEBUG_IMAGE: bool = DEBUG_MODE;
diff --git a/blade-render/code/ray-trace.wgsl b/blade-render/code/ray-trace.wgsl
index a51931ef..6f0a1f95 100644
--- a/blade-render/code/ray-trace.wgsl
+++ b/blade-render/code/ray-trace.wgsl
@@ -514,7 +514,7 @@ fn main(@builtin(global_invocation_id) global_id: vec3<u32>) {
     var rng = random_init(global_index, parameters.frame_index);
 
     let surface = read_surface(vec2<i32>(global_id.xy));
-    let enable_debug = all(global_id.xy == debug.mouse_pos);
+    let enable_debug = DEBUG_MODE && all(global_id.xy == debug.mouse_pos);
     let enable_restir_debug = (debug.draw_flags & DebugDrawFlags_RESTIR) != 0u && enable_debug;
     let ro = compute_restir(surface, vec2<i32>(global_id.xy), &rng, enable_restir_debug);
     let color = ro.radiance;
diff --git a/blade-render/src/asset_hub.rs b/blade-render/src/asset_hub.rs
index 4245d5d3..98b49533 100644
--- a/blade-render/src/asset_hub.rs
+++ b/blade-render/src/asset_hub.rs
@@ -34,6 +34,7 @@ impl AssetHub {
         );
 
         let mut sh_baker = crate::shader::Baker::new(gpu_context);
+        sh_baker.register_bool("DEBUG_MODE", cfg!(debug_assertions));
         sh_baker.register_enum::<crate::render::DebugMode>();
         sh_baker.register_bitflags::<crate::render::DebugDrawFlags>();
         sh_baker.register_bitflags::<crate::render::DebugTextureFlags>();
diff --git a/blade-render/src/render/mod.rs b/blade-render/src/render/mod.rs
index 2d61582f..751140a5 100644
--- a/blade-render/src/render/mod.rs
+++ b/blade-render/src/render/mod.rs
@@ -1044,10 +1044,7 @@ impl Renderer {
             draw_flags: config.draw_flags.bits(),
             texture_flags: config.texture_flags.bits(),
             unused: 0,
-            mouse_pos: match config.mouse_pos {
-                Some(p) => [p[0], self.surface_size.height as i32 - p[1]],
-                None => [-1; 2],
-            },
+            mouse_pos: config.mouse_pos.unwrap_or([-1; 2]),
         }
     }
 
diff --git a/blade-render/src/shader.rs b/blade-render/src/shader.rs
index d99c9de3..69a14f72 100644
--- a/blade-render/src/shader.rs
+++ b/blade-render/src/shader.rs
@@ -19,17 +19,20 @@ pub struct Shader {
     pub raw: Result<blade_graphics::Shader, &'static str>,
 }
 
-pub struct Expansion(HashMap<String, u32>);
+pub enum Expansion {
+    Values(HashMap<String, u32>),
+    Bool(bool),
+}
 impl Expansion {
     pub fn from_enum<E: strum::IntoEnumIterator + fmt::Debug + Into<u32>>() -> Self {
-        Self(
+        Self::Values(
             E::iter()
                 .map(|variant| (format!("{variant:?}"), variant.into()))
                 .collect(),
         )
     }
     pub fn from_bitflags<F: bitflags::Flags<Bits = u32>>() -> Self {
-        Self(
+        Self::Values(
             F::FLAGS
                 .iter()
                 .map(|flag| (flag.name().to_string(), flag.value().bits()))
@@ -64,6 +67,11 @@ impl Baker {
     pub fn register_bitflags<F: bitflags::Flags<Bits = u32>>(&mut self) {
         self.register::<F>(Expansion::from_bitflags::<F>());
     }
+
+    pub fn register_bool(&mut self, name: &str, value: bool) {
+        self.expansions
+            .insert(name.to_string(), Expansion::Bool(value));
+    }
 }
 
 fn parse_impl(
@@ -93,8 +101,16 @@ fn parse_impl(
             );
         } else if line.starts_with("#use") {
             let type_name = line.split_whitespace().last().unwrap();
-            for (key, value) in expansions[type_name].0.iter() {
-                writeln!(text_out, "const {}_{}: u32 = {}u;", type_name, key, value).unwrap();
+            match expansions[type_name] {
+                Expansion::Values(ref map) => {
+                    for (key, value) in map.iter() {
+                        writeln!(text_out, "const {}_{}: u32 = {}u;", type_name, key, value)
+                            .unwrap();
+                    }
+                }
+                Expansion::Bool(value) => {
+                    writeln!(text_out, "const {}: bool = {};", type_name, value).unwrap();
+                }
             }
         } else {
             *text_out += line;
diff --git a/examples/scene/main.rs b/examples/scene/main.rs
index 7b34e4c7..237546ef 100644
--- a/examples/scene/main.rs
+++ b/examples/scene/main.rs
@@ -257,18 +257,7 @@ impl Example {
             is_file_hovered: false,
             last_render_time: time::Instant::now(),
             render_times: VecDeque::with_capacity(FRAME_TIME_HISTORY),
-            ray_config: blade_render::RayConfig {
-                num_environment_samples: 1,
-                environment_importance_sampling: false,
-                temporal_tap: true,
-                temporal_history: 10,
-                spatial_taps: 1,
-                spatial_tap_history: 10,
-                spatial_radius: 10,
-                t_start: 0.1,
-                pairwise_mis: true,
-                defensive_mis: 0.0,
-            },
+            ray_config: blade_helpers::default_ray_config(),
             denoiser_enabled: true,
             denoiser_config: blade_render::DenoiserConfig {
                 num_passes: 3,
diff --git a/src/lib.rs b/src/lib.rs
index 2ee0b77a..01889de7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -482,18 +482,7 @@ impl Engine {
                 reset_variance: false,
                 reset_reservoirs: true,
             },
-            ray_config: blade_render::RayConfig {
-                num_environment_samples: 1,
-                environment_importance_sampling: false,
-                temporal_tap: true,
-                temporal_history: 10,
-                spatial_taps: 1,
-                spatial_tap_history: 10,
-                spatial_radius: 10,
-                t_start: 0.01,
-                pairwise_mis: true,
-                defensive_mis: 0.1,
-            },
+            ray_config: blade_helpers::default_ray_config(),
             denoiser_enabled: true,
             denoiser_config: blade_render::DenoiserConfig {
                 num_passes: 4,