diff --git a/assets/shaders/pbr/convolute_diffuse_irradiance.frag.wgsl b/assets/shaders/pbr/convolute_diffuse_irradiance.frag.wgsl
index 5ce7714d..426e438b 100644
--- a/assets/shaders/pbr/convolute_diffuse_irradiance.frag.wgsl
+++ b/assets/shaders/pbr/convolute_diffuse_irradiance.frag.wgsl
@@ -3,7 +3,8 @@ struct FragmentOutput {
 }
 
 struct Params {
-    time100: u32, // tick modulo 100
+    time97: u32, // tick modulo 100
+    sample_count: u32,
 }
 
 @group(0) @binding(0) var t_environment: texture_cube<f32>;
@@ -11,8 +12,6 @@ struct Params {
 
 @group(1) @binding(0) var<uniform> params: Params;
 
-const SAMPLE_COUNT: u32 = 16u;
-
 #include "sample.wgsl"
 
 @fragment
@@ -24,14 +23,14 @@ fn frag(@location(0) wpos: vec3<f32>) -> FragmentOutput {
     var irradiance: vec3<f32> = vec3(0.0);
     var totalWeight: f32 = 0.0;
 
-    for(var i: u32 = params.time100; i < SAMPLE_COUNT*97u; i += 97u) {
-        let Xi: vec2<f32> = Hammersley(i, SAMPLE_COUNT*97u);
+    for(var i: u32 = params.time97; i < params.sample_count*97u; i += 97u) {
+        let Xi: vec2<f32> = Hammersley(i, params.sample_count*97u);
         let ts: vec3<f32> = HemisphereSampleuniform(Xi); // tangeant space
 
         let ws: vec3<f32> = ts.x * right + ts.y * up + ts.z * normal; // world space
         irradiance += min(vec3(10.0), textureSampleLevel(t_environment, s_environment, ws, 0.0).rgb);
     }
-    irradiance = irradiance / f32(SAMPLE_COUNT);
+    irradiance = irradiance / f32(params.sample_count);
 
     return FragmentOutput(vec4(irradiance.r, irradiance.g, irradiance.b, 0.02));
 }
\ No newline at end of file
diff --git a/assets/shaders/pbr/specular_prefilter.frag.wgsl b/assets/shaders/pbr/specular_prefilter.frag.wgsl
index 36bca40d..af814660 100644
--- a/assets/shaders/pbr/specular_prefilter.frag.wgsl
+++ b/assets/shaders/pbr/specular_prefilter.frag.wgsl
@@ -4,7 +4,8 @@ struct FragmentOutput {
 
 struct Params {
     roughness: f32,
-    time100: u32, // tick modulo 100
+    time97: u32, // tick modulo 97
+    sample_count: u32,
 }
 
 @group(0) @binding(0) var t_environment: texture_cube<f32>;
@@ -12,8 +13,6 @@ struct Params {
 
 @group(1) @binding(0) var<uniform> params: Params;
 
-const SAMPLE_COUNT: u32 = 30u;
-
 #include "sample.wgsl"
 
 fn ImportanceSampleGGX(Xi: vec2<f32>, N: vec3<f32>, roughness: f32) -> vec3<f32> {
@@ -41,8 +40,8 @@ fn frag(@location(0) wpos: vec3<f32>) -> FragmentOutput {
     var totalWeight: f32 = 0.0;
     var color: vec3<f32> = vec3(0.0);
 
-    for(var i: u32 = params.time100; i < SAMPLE_COUNT*97u; i += 97u) {
-        let Xi: vec2<f32> = Hammersley(i, SAMPLE_COUNT*97u);
+    for(var i: u32 = params.time97; i < params.sample_count*97u; i += 97u) {
+        let Xi: vec2<f32> = Hammersley(i, params.sample_count*97u);
 
         let H: vec3<f32>  = ImportanceSampleGGX(Xi, normal, params.roughness);
         let L: vec3<f32>  = normalize(2.0 * dot(V, H) * H - V);
diff --git a/engine/src/drawables/lit_mesh.rs b/engine/src/drawables/lit_mesh.rs
index 55bdafc7..bbd04a17 100644
--- a/engine/src/drawables/lit_mesh.rs
+++ b/engine/src/drawables/lit_mesh.rs
@@ -5,7 +5,7 @@ use wgpu::{
     TextureViewDescriptor, TextureViewDimension, VertexBufferLayout,
 };
 
-use geom::{Camera, InfiniteFrustrum, LinearColor, Matrix4, Plane, Sphere, Vec2, Vec3};
+use geom::{Camera, InfiniteFrustrum, LinearColor, Matrix4, Sphere, Vec2, Vec3};
 
 use crate::meshbuild::MeshLod;
 use crate::{
@@ -134,6 +134,8 @@ impl Mesh {
         dest: &Texture,
         dest_msaa: &Texture,
     ) {
+        const SHADOWMAP_RES: i32 = 1024;
+
         let mut encoder = gfx
             .device
             .create_command_encoder(&wgpu::CommandEncoderDescriptor {
@@ -142,7 +144,8 @@ impl Mesh {
 
         let sun = Vec3::new(0.5, -1.3, 0.9).normalize();
 
-        let smap_mat = cam.build_sun_shadowmap_matrix(sun, 1024.0, &InfiniteFrustrum::EMPTY);
+        let smap_mat =
+            cam.build_sun_shadowmap_matrix(sun, SHADOWMAP_RES as f32, &InfiniteFrustrum::EMPTY);
 
         let mut params = gfx.render_params.clone(&gfx.device);
         let value = params.value_mut();
@@ -161,7 +164,7 @@ impl Mesh {
         ];
         value.time = 0.0;
         value.time_always = 0.0;
-        value.shadow_mapping_resolution = 1024;
+        value.shadow_mapping_resolution = SHADOWMAP_RES;
 
         params.upload_to_gpu(&gfx.queue);
 
diff --git a/engine/src/passes/pbr.rs b/engine/src/passes/pbr.rs
index c57f819c..00d5f798 100644
--- a/engine/src/passes/pbr.rs
+++ b/engine/src/passes/pbr.rs
@@ -36,13 +36,15 @@ enum PbrPipeline {
 #[derive(Default, Copy, Clone, Debug)]
 struct SpecularParams {
     roughness: f32,
-    time100: u32,
+    time97: u32,
+    sample_count: u32,
 }
 
 #[repr(C)]
 #[derive(Default, Copy, Clone, Debug)]
 struct DiffuseParams {
-    time100: u32,
+    time97: u32,
+    sample_count: u32,
 }
 
 u8slice_impl!(SpecularParams);
@@ -180,7 +182,8 @@ impl Pbr {
         self.diffuse_uniform.write_direct(
             &gfx.queue,
             &DiffuseParams {
-                time100: ((gfx.tick * 7) % 97) as u32,
+                time97: ((gfx.tick * 7) % 97) as u32,
+                sample_count: if gfx.tick == 0 { 1024 } else { 32 },
             },
         );
         for face in 0..6u32 {
@@ -216,11 +219,11 @@ impl Pbr {
                 &gfx.queue,
                 &SpecularParams {
                     roughness,
-                    time100: ((gfx.tick * 7) % 97) as u32,
+                    time97: ((gfx.tick * 7) % 97) as u32,
+                    sample_count: if gfx.tick == 0 { 1024 } else { 60 },
                 },
             );
-            for face in 0..3 {
-                let face = face as u32 + ((gfx.tick % 2) * 3) as u32;
+            for face in 0..6 {
                 let mut pass = enc.begin_render_pass(&RenderPassDescriptor {
                     label: Some(format!("specular prefilter face {face} mip {mip}").as_str()),
                     color_attachments: &[Some(RenderPassColorAttachment {
diff --git a/engine/src/texture.rs b/engine/src/texture.rs
index f31aceba..8c87f9f0 100644
--- a/engine/src/texture.rs
+++ b/engine/src/texture.rs
@@ -233,7 +233,13 @@ impl Texture {
         })
     }
 
-    pub fn save_to_file(&self, device: &Device, queue: &wgpu::Queue, path: PathBuf) {
+    pub fn save_to_file(
+        &self,
+        device: &Device,
+        queue: &wgpu::Queue,
+        path: PathBuf,
+        mip_level: u32,
+    ) {
         match self.format {
             TextureFormat::Rgba8Unorm | TextureFormat::Rgba8UnormSrgb => {}
             _ => {
@@ -242,13 +248,17 @@ impl Texture {
             }
         }
 
+        let w = self.extent.width >> mip_level;
+        let h = self.extent.height >> mip_level;
+        let size = w * h;
+
         debug_assert!(self.extent.depth_or_array_layers == 1);
 
         let block_size = self.format.block_copy_size(None).unwrap();
 
         let image_data_buf = Arc::new(device.create_buffer(&wgpu::BufferDescriptor {
             label: Some("save_to_file"),
-            size: (block_size * self.extent.width * self.extent.height) as u64,
+            size: (block_size * size) as u64,
             usage: wgpu::BufferUsages::COPY_DST | wgpu::BufferUsages::MAP_READ,
             mapped_at_creation: false,
         }));
@@ -260,7 +270,7 @@ impl Texture {
         encoder.copy_texture_to_buffer(
             ImageCopyTexture {
                 texture: &self.texture,
-                mip_level: 0,
+                mip_level,
                 origin: wgpu::Origin3d::ZERO,
                 aspect: wgpu::TextureAspect::All,
             },
@@ -268,7 +278,7 @@ impl Texture {
                 buffer: &image_data_buf,
                 layout: ImageDataLayout {
                     offset: 0,
-                    bytes_per_row: Some(block_size * self.extent.width),
+                    bytes_per_row: Some(block_size * w),
                     rows_per_image: None,
                 },
             },
@@ -278,7 +288,6 @@ impl Texture {
         queue.submit(std::iter::once(encoder.finish()));
 
         let image_data_buf_cpy = image_data_buf.clone();
-        let extent_cpy = self.extent;
         image_data_buf.slice(..).map_async(MapMode::Read, move |v| {
             if v.is_err() {
                 log::error!("Failed to map buffer for reading for save_to_file");
@@ -287,9 +296,7 @@ impl Texture {
 
             let v = image_data_buf_cpy.slice(..).get_mapped_range();
 
-            let Some(rgba) =
-                image::RgbaImage::from_raw(extent_cpy.width, extent_cpy.height, v.to_vec())
-            else {
+            let Some(rgba) = image::RgbaImage::from_raw(w, h, v.to_vec()) else {
                 log::error!("Failed to create image from buffer for save_to_file");
                 return;
             };
diff --git a/native_app/src/gui/chat.rs b/native_app/src/gui/chat.rs
index 2b1b561a..aa333ac3 100644
--- a/native_app/src/gui/chat.rs
+++ b/native_app/src/gui/chat.rs
@@ -57,7 +57,7 @@ pub fn chat(ui: &egui::Context, uiw: &UiWorld, sim: &Simulation) {
                 ui.allocate_space(egui::Vec2::new(250.0, 0.0));
 
                 if msgs.len() < 12 {
-                    ui.add_space((12 - msgs.len()) as f32 * tweak!(24.0));
+                    ui.add_space((12 - msgs.len()) as f32 * 24.0);
                 }
 
                 for message in msgs.iter().rev() {
diff --git a/native_app/src/newgui/hud/mod.rs b/native_app/src/newgui/hud.rs
similarity index 97%
rename from native_app/src/newgui/hud/mod.rs
rename to native_app/src/newgui/hud.rs
index 748f19a6..314676bb 100644
--- a/native_app/src/newgui/hud/mod.rs
+++ b/native_app/src/newgui/hud.rs
@@ -45,8 +45,8 @@ pub fn render_newgui(uiworld: &UiWorld, sim: &Simulation) {
             minrow(5.0, || {
                 let ids = &uiworld.read::<IconTextures>().ids;
 
-                for id in ids {
-                    image(*id, Vec2::splat(128.0));
+                for id in ids.values() {
+                    image(*id, Vec2::splat(96.0));
                 }
             });
         });
diff --git a/native_app/src/newgui/hud/time_controls.rs b/native_app/src/newgui/hud/time_controls.rs
index 38424f6b..16573772 100644
--- a/native_app/src/newgui/hud/time_controls.rs
+++ b/native_app/src/newgui/hud/time_controls.rs
@@ -99,7 +99,7 @@ pub fn time_controls(uiworld: &UiWorld, sim: &Simulation) {
                             let mut l = List::column();
                             l.cross_axis_alignment = CrossAxisAlignment::Stretch;
                             l.main_axis_size = MainAxisSize::Min;
-                            l.item_spacing = tweak!(5.0);
+                            l.item_spacing = 5.0;
                             l.show(time_text);
                         });
                     });
diff --git a/native_app/src/newgui/mod.rs b/native_app/src/newgui/mod.rs
index 8fc8d30b..3cc7bddf 100644
--- a/native_app/src/newgui/mod.rs
+++ b/native_app/src/newgui/mod.rs
@@ -9,6 +9,7 @@ use simulation::map::BuildingID;
 use simulation::world_command::WorldCommand;
 use simulation::{AnyEntity, Simulation};
 use std::borrow::Cow;
+use std::path::PathBuf;
 use yakui::TextureId;
 
 mod hud;
@@ -19,8 +20,7 @@ pub use tools::*;
 
 #[derive(Default)]
 pub struct IconTextures {
-    texs: FastMap<BuildingPrototypeID, engine::Texture>,
-    ids: Vec<TextureId>,
+    ids: FastMap<BuildingPrototypeID, TextureId>,
 }
 
 pub fn do_icons(gfx: &mut GfxContext, uiw: &mut UiWorld, yakui: &mut YakuiWrapper) {
@@ -28,9 +28,9 @@ pub fn do_icons(gfx: &mut GfxContext, uiw: &mut UiWorld, yakui: &mut YakuiWrappe
 
     let mut cam = Camera::new(Vec3::new(0.0, 0.0, 0.0), 256.0, 256.0);
 
-    cam.fovy = tweak!(30.0);
+    cam.fovy = 30.0;
     cam.pitch = Degrees(35.0).into();
-    cam.yaw = Degrees(tweak!(-130.0)).into();
+    cam.yaw = Degrees(-130.0).into();
 
     state.ids.clear();
 
@@ -38,9 +38,20 @@ pub fn do_icons(gfx: &mut GfxContext, uiw: &mut UiWorld, yakui: &mut YakuiWrappe
         let RenderAsset::Mesh { ref path } = building.asset else {
             continue;
         };
-        //if state.texs.contains_key(&building.id) {
+        if state.ids.contains_key(&building.id) {
+            continue;
+        }
+        let cache_path = PathBuf::from(format!(
+            "assets/generated/building_icons/{}.png",
+            building.id.hash()
+        ));
+        //if std::fs::metadata(&cache_path).is_ok() {
+        //    let t = TextureBuilder::from_path(&cache_path).build(&gfx.device, &gfx.queue);
+        //    let tex_id = yakui.add_texture(&t);
+        //    state.ids.insert(building.id, tex_id);
         //    continue;
         //}
+
         let Ok(mesh) = gfx.mesh(path.as_ref()) else {
             continue;
         };
@@ -49,6 +60,7 @@ pub fn do_icons(gfx: &mut GfxContext, uiw: &mut UiWorld, yakui: &mut YakuiWrappe
             .with_label("building icon")
             .with_usage(
                 engine::wgpu::TextureUsages::COPY_DST
+                    | engine::wgpu::TextureUsages::COPY_SRC
                     | engine::wgpu::TextureUsages::RENDER_ATTACHMENT
                     | engine::wgpu::TextureUsages::TEXTURE_BINDING,
             )
@@ -66,10 +78,12 @@ pub fn do_icons(gfx: &mut GfxContext, uiw: &mut UiWorld, yakui: &mut YakuiWrappe
         cam.update();
 
         mesh.render_to_texture(&cam, gfx, &t, &t_msaa);
+
+        t.save_to_file(&gfx.device, &gfx.queue, cache_path, 0);
+
         let tex_id = yakui.add_texture(&t);
 
-        state.texs.insert(building.id, t);
-        state.ids.push(tex_id);
+        state.ids.insert(building.id, tex_id);
     }
 }
 
diff --git a/native_app/src/newgui/tools/specialbuilding.rs b/native_app/src/newgui/tools/specialbuilding.rs
index 470a20dd..159379bb 100644
--- a/native_app/src/newgui/tools/specialbuilding.rs
+++ b/native_app/src/newgui/tools/specialbuilding.rs
@@ -88,9 +88,7 @@ pub fn specialbuilding(sim: &Simulation, uiworld: &UiWorld) {
         let col = if red {
             simulation::colors().gui_danger.adjust_luminosity(1.3)
         } else {
-            simulation::colors()
-                .gui_primary
-                .adjust_luminosity(tweak!(1.5))
+            simulation::colors().gui_primary.adjust_luminosity(1.5)
         };
 
         if p.ends_with(".png") || p.ends_with(".jpg") {
diff --git a/simulation/src/economy/market.rs b/simulation/src/economy/market.rs
index 958a4b03..727b2e9b 100644
--- a/simulation/src/economy/market.rs
+++ b/simulation/src/economy/market.rs
@@ -496,7 +496,7 @@ mod tests {
             n_trucks = 1,
             n_workers = 2,
             size = 0.0,
-            asset_location = "",
+            asset = "no.jpg",
             price = 0,
         },
         {
@@ -518,7 +518,7 @@ mod tests {
             n_trucks = 1,
             n_workers = 5,
             size = 0.0,
-            asset_location = "",
+            asset = "no.jpg",
             price = 0,
         }}
         "#,