diff --git a/context/src/core/context.rs b/context/src/core/context.rs
index ad27ce3..1a22959 100644
--- a/context/src/core/context.rs
+++ b/context/src/core/context.rs
@@ -25,7 +25,7 @@ use std::time::{Duration, Instant};
 pub struct Context {
     core: VulkanCore,
     pub(crate) presentation: PresentationCore,
-    render_core: Arc<RwLock<Box<dyn RenderCore>>>,
+    render_core: Arc<RwLock<RenderCore>>,
 
     #[cfg(feature = "sound")]
     sound_handler: SoundHandler,
@@ -89,11 +89,11 @@ impl Context {
         Ok(true)
     }
 
-    pub fn render_core(&self) -> impl Deref<Target = Box<dyn RenderCore>> + '_ {
+    pub fn render_core(&self) -> impl Deref<Target = RenderCore> + '_ {
         self.render_core.read().unwrap()
     }
 
-    pub fn render_core_mut(&self) -> impl DerefMut<Target = Box<dyn RenderCore>> + '_ {
+    pub fn render_core_mut(&self) -> impl DerefMut<Target = RenderCore> + '_ {
         self.render_core.write().unwrap()
     }
 
diff --git a/engine/src/engine/engine.rs b/engine/src/engine/engine.rs
index 8f57020..b3bafd1 100644
--- a/engine/src/engine/engine.rs
+++ b/engine/src/engine/engine.rs
@@ -13,23 +13,29 @@ use crate::prelude::*;
 use std::collections::HashMap;
 use std::sync::Arc;
 
-struct GuiPostProcess(Arc<GuiHandler>);
-
-impl context::prelude::PostProcess for GuiPostProcess {
-    fn priority(&self) -> u32 {
-        50
-    }
+pub struct GuiHandlerRenderer {
+    pub gui_handler: Arc<GuiHandler>,
+}
 
+impl TScene for GuiHandlerRenderer {
     fn process(
-        &self,
+        &mut self,
         buffer_recorder: &mut CommandBufferRecorder<'_>,
+        _images: &TargetMode<Vec<Arc<Image>>>,
         indices: &TargetMode<usize>,
+        _world: &World,
     ) -> Result<()> {
-        self.0.process(buffer_recorder, indices)
+        self.gui_handler.process(buffer_recorder, indices)
     }
 
-    fn resize(&self, width: u32, height: u32, images: &TargetMode<Vec<Arc<Image>>>) -> Result<()> {
-        self.0.resize(width, height, images)
+    fn resize(
+        &mut self,
+        window_width: f32,
+        window_height: f32,
+        images: &TargetMode<Vec<Arc<Image>>>,
+    ) -> Result<()> {
+        self.gui_handler
+            .resize(window_width as u32, window_height as u32, images)
     }
 }
 
@@ -166,11 +172,13 @@ impl Engine {
 
         let asset_manager = AssetManager::new(&engine_settings)?;
 
-        let gui_handler = GuiHandler::new(create_info.gui_info, &context)?;
-        let gui_post_process = Arc::new(GuiPostProcess(gui_handler.clone()));
+        let gui_handler = GuiHandlerRenderer {
+            gui_handler: GuiHandler::new(create_info.gui_info, &context)?,
+        };
+
         context
-            .render_core()
-            .add_post_processing_routine(gui_post_process.clone());
+            .render_core_mut()
+            .add_render_routine::<GuiHandlerRenderer>(10_000_000);
 
         world.resources.insert(gui_handler);
 
@@ -249,23 +257,25 @@ impl Engine {
 
 impl Engine {
     fn main_system<T: EventConsumer>(world: &mut World) -> Result<bool> {
-        world
-            .resources
-            .get::<Arc<GuiHandler>>()
-            .process_callbacks()?;
-
-        let gui_handler = world.resources.get_unchecked::<Arc<GuiHandler>>();
+        let gui_handler = world.resources.get_unchecked::<GuiHandlerRenderer>();
         let input_map = world.resources.get_unchecked::<InputMap>();
         let context = world.resources.get_unchecked::<Context>();
 
         let res = world.resources.get_mut_unchecked::<Context>().next_frame(
             world,
             |world, consumer: &mut T, event| {
-                Self::event(world, context, gui_handler, input_map, consumer, event)
+                Self::event(
+                    world,
+                    context,
+                    &gui_handler.gui_handler,
+                    input_map,
+                    consumer,
+                    event,
+                )
             },
         )?;
 
-        gui_handler.process_callbacks()?;
+        gui_handler.gui_handler.process_callbacks()?;
 
         Ok(res)
     }
diff --git a/engine/src/engine/engine_create_info.rs b/engine/src/engine/engine_create_info.rs
index 2ed40c8..aa8e1a7 100644
--- a/engine/src/engine/engine_create_info.rs
+++ b/engine/src/engine/engine_create_info.rs
@@ -54,7 +54,7 @@ impl<'a> Default for EngineCreateInfo<'a> {
                 enable_game_mode: true,
             },
             vulkan_debug_info: VulkanDebugInfo {
-                debugging: false,
+                debugging: true,
                 steam_layer: false,
                 verbose: false,
                 renderdoc: false,
diff --git a/presentation/Cargo.toml b/presentation/Cargo.toml
index d80f385..d97e826 100644
--- a/presentation/Cargo.toml
+++ b/presentation/Cargo.toml
@@ -9,7 +9,6 @@ vulkan-rs = { workspace = true }
 ui = { workspace = true }
 sdl2 = { workspace = true }
 anyhow = { workspace = true }
-destructure_traitobject = { workspace = true }
 
 openxr = { workspace = true, optional = true }
 openvr = { workspace = true, optional = true }
diff --git a/presentation/src/lib.rs b/presentation/src/lib.rs
index 72f1eb7..442692e 100644
--- a/presentation/src/lib.rs
+++ b/presentation/src/lib.rs
@@ -34,25 +34,25 @@ pub fn create_render_core<S: TScene + 'static>(
     device: &Arc<Device>,
     queue: &Arc<Mutex<Queue>>,
     create_info: RenderCoreCreateInfo,
-) -> Result<(Box<dyn RenderCore>, TargetMode<()>)> {
+) -> Result<(RenderCore, TargetMode<()>)> {
     match presentation_core.backend() {
         PresentationBackend::Window(wsi) => {
             let (render_core, target_mode) =
-                VulkanWindowRenderCore::<S>::new(wsi.clone(), device, queue, create_info)?;
+                VulkanWindowRenderCore::new(wsi.clone(), device, queue, create_info)?;
 
-            Ok((Box::new(render_core), target_mode))
+            Ok((render_core.into(), target_mode))
         }
         PresentationBackend::OpenXR(xri) => {
             let (render_core, target_mode) =
                 xri::openxrrendercore::OpenXRRenderCore::new(xri, device, queue, create_info)?;
 
-            Ok((Box::new(render_core), target_mode))
+            Ok((render_core.into(), target_mode))
         }
         PresentationBackend::OpenVR(vri) => {
             let (render_core, target_mode) =
                 vri::openvrrendercore::OpenVRRenderCore::new(vri, device, queue, create_info)?;
 
-            Ok((Box::new(render_core), target_mode))
+            Ok((render_core.into(), target_mode))
         }
     }
 }
diff --git a/presentation/src/renderbackend.rs b/presentation/src/renderbackend.rs
index 0984243..ccbb739 100644
--- a/presentation/src/renderbackend.rs
+++ b/presentation/src/renderbackend.rs
@@ -169,12 +169,8 @@ impl RenderBackend {
         // make a call to the connected scenes
         self.render_routines
             .iter_mut()
-            .try_for_each(|(_, type_id)| {
-                let scene: &mut dyn TScene = unsafe {
-                    std::mem::transmute(destructure_traitobject::data_mut(
-                        world.resources.get_mut_by_type_id_untyped(*type_id),
-                    ))
-                };
+            .try_for_each(|(_, type_id)| -> Result<()> {
+                let scene: &mut dyn TScene = world.resources.get_mut_by_type_id_untyped(*type_id);
 
                 scene.process(
                     &mut buffer_recorder,
@@ -182,6 +178,8 @@ impl RenderBackend {
                     &image_indices,
                     world,
                 )?;
+
+                Ok(())
             })?;
 
         Ok(&self.command_buffer)
@@ -207,14 +205,10 @@ impl RenderBackend {
 
         self.render_routines
             .iter_mut()
-            .try_for_each(|(_, type_id)| {
-                let scene: &mut dyn TScene = unsafe {
-                    std::mem::transmute(destructure_traitobject::data_mut(
-                        world.resources.get_mut_by_type_id_untyped(*type_id),
-                    ))
-                };
+            .try_for_each(|(_, type_id)| -> Result<()> {
+                let scene: &mut dyn TScene = world.resources.get_mut_by_type_id_untyped(*type_id);
 
-                scene.resize(width, height, &images)
+                scene.resize(width as f32, height as f32, &images)
             })?;
 
         Ok(())
@@ -227,12 +221,12 @@ impl RenderBackend {
     }
 
     pub fn remove_render_routine<T: TScene>(&mut self) {
-        if let Some(index) = self
+        if let Some(&(index, _)) = self
             .render_routines
             .iter()
             .find(|(_, type_id)| *type_id == TypeId::of::<T>())
         {
-            self.render_routines.remove(index)
+            self.render_routines.remove(index as usize);
         }
     }
 
diff --git a/presentation/src/traits.rs b/presentation/src/traits.rs
index 8f38f05..ab01f9d 100644
--- a/presentation/src/traits.rs
+++ b/presentation/src/traits.rs
@@ -2,7 +2,10 @@ use ecs::World;
 use ui::prelude::*;
 use vulkan_rs::prelude::*;
 
-use crate::Result;
+use crate::{
+    Result, vri::openvrrendercore::OpenVRRenderCore,
+    wsi::vulkanwindowrendercore::VulkanWindowRenderCore, xri::openxrrendercore::OpenXRRenderCore,
+};
 
 use std::sync::Arc;
 
@@ -25,26 +28,123 @@ pub trait TScene: Send + Sync + 'static {
     ) -> Result<()>;
 }
 
-pub trait RenderCore: std::fmt::Debug + Send + Sync {
-    fn next_frame(&mut self, world: &mut World) -> Result<bool>;
+#[derive(Debug)]
+pub enum RenderCore {
+    Wsi(VulkanWindowRenderCore),
+    OpenVR(OpenVRRenderCore),
+    OpenXR(OpenXRRenderCore),
+}
 
-    fn resize(&mut self, world: &mut World, w: u32, h: u32) -> Result<()>;
+impl RenderCore {
+    pub fn next_frame(&mut self, world: &mut World) -> Result<bool> {
+        match self {
+            RenderCore::Wsi(rc) => rc.next_frame(world),
+            RenderCore::OpenVR(rc) => rc.next_frame(world),
+            RenderCore::OpenXR(rc) => rc.next_frame(world),
+        }
+    }
 
-    fn format(&self) -> VkFormat;
-    fn image_layout(&self) -> VkImageLayout {
+    pub fn resize(&mut self, world: &mut World, w: u32, h: u32) -> Result<()> {
+        match self {
+            RenderCore::Wsi(rc) => rc.resize(world, w, h),
+            RenderCore::OpenVR(rc) => rc.resize(world, w, h),
+            RenderCore::OpenXR(rc) => rc.resize(world, w, h),
+        }
+    }
+
+    pub fn format(&self) -> VkFormat {
+        match self {
+            RenderCore::Wsi(rc) => rc.format(),
+            RenderCore::OpenVR(rc) => rc.format(),
+            RenderCore::OpenXR(rc) => rc.format(),
+        }
+    }
+
+    pub fn image_layout(&self) -> VkImageLayout {
         VK_IMAGE_LAYOUT_PRESENT_SRC_KHR
     }
 
-    // render routines
-    fn add_render_routine<T: TScene>(&mut self, priority: u32);
-    fn remove_render_routine<T: TScene>(&mut self);
+    /// lower priority means it is more important
+    pub fn add_render_routine<T: TScene>(&mut self, priority: u32) {
+        match self {
+            RenderCore::Wsi(rc) => rc.add_render_routine::<T>(priority),
+            RenderCore::OpenVR(rc) => rc.add_render_routine::<T>(priority),
+            RenderCore::OpenXR(rc) => rc.add_render_routine::<T>(priority),
+        }
+    }
 
-    fn set_clear_color(&self, color: [f32; 4]);
+    pub fn remove_render_routine<T: TScene>(&mut self) {
+        match self {
+            RenderCore::Wsi(rc) => rc.remove_render_routine::<T>(),
+            RenderCore::OpenVR(rc) => rc.remove_render_routine::<T>(),
+            RenderCore::OpenXR(rc) => rc.remove_render_routine::<T>(),
+        }
+    }
+
+    pub fn set_clear_color(&self, color: [f32; 4]) {
+        match self {
+            RenderCore::Wsi(rc) => rc.set_clear_color(color),
+            RenderCore::OpenVR(rc) => rc.set_clear_color(color),
+            RenderCore::OpenXR(rc) => rc.set_clear_color(color),
+        }
+    }
 
     // getter
-    fn image_count(&self) -> usize;
-    fn images(&self) -> TargetMode<Vec<Arc<Image>>>;
-    fn width(&self) -> u32;
-    fn height(&self) -> u32;
-    fn transformations(&self) -> Option<(VRTransformations, VRTransformations)>;
+    pub fn image_count(&self) -> usize {
+        match self {
+            RenderCore::Wsi(rc) => rc.image_count(),
+            RenderCore::OpenVR(rc) => rc.image_count(),
+            RenderCore::OpenXR(rc) => rc.image_count(),
+        }
+    }
+
+    pub fn images(&self) -> TargetMode<Vec<Arc<Image>>> {
+        match self {
+            RenderCore::Wsi(rc) => rc.images(),
+            RenderCore::OpenVR(rc) => rc.images(),
+            RenderCore::OpenXR(rc) => rc.images(),
+        }
+    }
+
+    pub fn width(&self) -> u32 {
+        match self {
+            RenderCore::Wsi(rc) => rc.width(),
+            RenderCore::OpenVR(rc) => rc.width(),
+            RenderCore::OpenXR(rc) => rc.width(),
+        }
+    }
+
+    pub fn height(&self) -> u32 {
+        match self {
+            RenderCore::Wsi(rc) => rc.height(),
+            RenderCore::OpenVR(rc) => rc.height(),
+            RenderCore::OpenXR(rc) => rc.height(),
+        }
+    }
+
+    pub fn transformations(&self) -> Option<(VRTransformations, VRTransformations)> {
+        match self {
+            RenderCore::Wsi(rc) => rc.transformations(),
+            RenderCore::OpenVR(rc) => rc.transformations(),
+            RenderCore::OpenXR(rc) => rc.transformations(),
+        }
+    }
+}
+
+impl From<VulkanWindowRenderCore> for RenderCore {
+    fn from(value: VulkanWindowRenderCore) -> Self {
+        Self::Wsi(value)
+    }
+}
+
+impl From<OpenXRRenderCore> for RenderCore {
+    fn from(value: OpenXRRenderCore) -> Self {
+        Self::OpenXR(value)
+    }
+}
+
+impl From<OpenVRRenderCore> for RenderCore {
+    fn from(value: OpenVRRenderCore) -> Self {
+        Self::OpenVR(value)
+    }
 }
diff --git a/presentation/src/vri/mod.rs b/presentation/src/vri/mod.rs
index d771950..b88b96a 100644
--- a/presentation/src/vri/mod.rs
+++ b/presentation/src/vri/mod.rs
@@ -74,50 +74,50 @@ pub mod openvrrendercore {
         }
     }
 
-    impl RenderCore for OpenVRRenderCore {
-        fn format(&self) -> VkFormat {
+    impl OpenVRRenderCore {
+        pub fn format(&self) -> VkFormat {
             unimplemented!()
         }
 
-        fn resize(&mut self, _: &mut World, _: u32, _: u32) -> Result<()> {
+        pub fn resize(&mut self, _: &mut World, _: u32, _: u32) -> Result<()> {
             unimplemented!()
         }
 
-        fn next_frame(&mut self, _: &mut World) -> Result<bool> {
+        pub fn next_frame(&mut self, _: &mut World) -> Result<bool> {
             unimplemented!()
         }
 
-        fn set_clear_color(&self, _: [f32; 4]) {
+        pub fn set_clear_color(&self, _: [f32; 4]) {
             unimplemented!()
         }
 
         // post process handling
-        fn add_render_routine<T: TScene>(&mut self, priority: u32) {
-            todo!()
+        pub fn add_render_routine<T: TScene>(&mut self, _priority: u32) {
+            unimplemented!()
         }
 
-        fn remove_render_routine<T: TScene>(&mut self) {
-            todo!()
+        pub fn remove_render_routine<T: TScene>(&mut self) {
+            unimplemented!()
         }
 
         // getter
-        fn image_count(&self) -> usize {
+        pub fn image_count(&self) -> usize {
             unimplemented!()
         }
 
-        fn images(&self) -> TargetMode<Vec<Arc<Image>>> {
+        pub fn images(&self) -> TargetMode<Vec<Arc<Image>>> {
             unimplemented!()
         }
 
-        fn width(&self) -> u32 {
+        pub fn width(&self) -> u32 {
             unimplemented!()
         }
 
-        fn height(&self) -> u32 {
+        pub fn height(&self) -> u32 {
             unimplemented!()
         }
 
-        fn transformations(&self) -> Option<(VRTransformations, VRTransformations)> {
+        pub fn transformations(&self) -> Option<(VRTransformations, VRTransformations)> {
             unimplemented!()
         }
     }
diff --git a/presentation/src/wsi/vulkanwindowrendercore.rs b/presentation/src/wsi/vulkanwindowrendercore.rs
index 6f52fda..e3edd34 100644
--- a/presentation/src/wsi/vulkanwindowrendercore.rs
+++ b/presentation/src/wsi/vulkanwindowrendercore.rs
@@ -14,7 +14,7 @@ use std::sync::{
 use std::time::Duration;
 use std::u64;
 
-pub struct VulkanWindowRenderCore<S: TScene + 'static> {
+pub struct VulkanWindowRenderCore {
     device: Arc<Device>,
 
     // driver provided images
@@ -27,14 +27,14 @@ pub struct VulkanWindowRenderCore<S: TScene + 'static> {
     render_finished_sem: Arc<Semaphore>,
     render_fence: Arc<Fence>,
 
-    render_backend: RenderBackend<S>,
+    render_backend: RenderBackend,
 
     current_image_index: AtomicUsize,
 
     wsi: Arc<WindowSystemIntegration>,
 }
 
-impl<S: TScene + 'static> VulkanWindowRenderCore<S> {
+impl VulkanWindowRenderCore {
     pub fn new(
         wsi: Arc<WindowSystemIntegration>,
         device: &Arc<Device>,
@@ -57,7 +57,7 @@ impl<S: TScene + 'static> VulkanWindowRenderCore<S> {
             )));
         }
 
-        let usage = create_info.usage | RenderBackend::<S>::required_image_usage();
+        let usage = create_info.usage | RenderBackend::required_image_usage();
 
         // create swapchain
         let swapchain = Swapchain::new(
@@ -140,12 +140,12 @@ impl<S: TScene + 'static> VulkanWindowRenderCore<S> {
     }
 }
 
-impl<S: TScene + 'static> RenderCore for VulkanWindowRenderCore<S> {
-    fn format(&self) -> VkFormat {
+impl VulkanWindowRenderCore {
+    pub fn format(&self) -> VkFormat {
         self.format
     }
 
-    fn resize(&mut self, world: &mut World, w: u32, h: u32) -> Result<()> {
+    pub fn resize(&mut self, world: &mut World, w: u32, h: u32) -> Result<()> {
         self.swapchain.recreate((w, h))?;
 
         let swapchain_images = self.swapchain.wrap_images(
@@ -164,7 +164,7 @@ impl<S: TScene + 'static> RenderCore for VulkanWindowRenderCore<S> {
         Ok(())
     }
 
-    fn next_frame(&mut self, world: &mut World) -> Result<bool> {
+    pub fn next_frame(&mut self, world: &mut World) -> Result<bool> {
         self.aquire_next_image_index(world)?;
 
         let command_buffer = self.render_backend.render(
@@ -208,48 +208,42 @@ impl<S: TScene + 'static> RenderCore for VulkanWindowRenderCore<S> {
         Ok(true)
     }
 
-    fn set_clear_color(&self, color: [f32; 4]) {
+    pub fn set_clear_color(&self, color: [f32; 4]) {
         self.render_backend.set_clear_color(color);
     }
 
     // post process handling
-    fn add_post_processing_routine(&self, post_process: Arc<dyn PostProcess>) {
-        self.render_backend
-            .add_post_processing_routine(post_process);
+    pub fn add_render_routine<T: TScene>(&mut self, priority: u32) {
+        self.render_backend.add_render_routine::<T>(priority);
     }
 
-    fn remove_post_processing_routine(&self, post_process: Arc<dyn PostProcess>) {
-        self.render_backend
-            .remove_post_processing_routine(post_process);
-    }
-
-    fn clear_post_processing_routines(&self) {
-        self.render_backend.clear_post_processing_routines();
+    pub fn remove_render_routine<T: TScene>(&mut self) {
+        self.render_backend.remove_render_routine::<T>();
     }
 
     // getter
-    fn image_count(&self) -> usize {
+    pub fn image_count(&self) -> usize {
         self.render_backend.image_count()
     }
 
-    fn images(&self) -> TargetMode<Vec<Arc<Image>>> {
+    pub fn images(&self) -> TargetMode<Vec<Arc<Image>>> {
         self.render_backend.images()
     }
 
-    fn width(&self) -> u32 {
+    pub fn width(&self) -> u32 {
         self.swapchain.width()
     }
 
-    fn height(&self) -> u32 {
+    pub fn height(&self) -> u32 {
         self.swapchain.height()
     }
 
-    fn transformations(&self) -> Option<(VRTransformations, VRTransformations)> {
+    pub fn transformations(&self) -> Option<(VRTransformations, VRTransformations)> {
         None
     }
 }
 
-impl<S: TScene + 'static> std::fmt::Debug for VulkanWindowRenderCore<S> {
+impl std::fmt::Debug for VulkanWindowRenderCore {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "VulkanWindowRenderCore {{ }}")
     }
diff --git a/presentation/src/xri/mod.rs b/presentation/src/xri/mod.rs
index 7d17581..3f2e530 100644
--- a/presentation/src/xri/mod.rs
+++ b/presentation/src/xri/mod.rs
@@ -72,54 +72,50 @@ pub mod openxrrendercore {
         }
     }
 
-    impl RenderCore for OpenXRRenderCore {
-        fn format(&self) -> VkFormat {
+    impl OpenXRRenderCore {
+        pub fn format(&self) -> VkFormat {
             unimplemented!()
         }
 
-        fn resize(&mut self, _: &mut World, _: u32, _: u32) -> Result<()> {
+        pub fn resize(&mut self, _: &mut World, _: u32, _: u32) -> Result<()> {
             unimplemented!()
         }
 
-        fn next_frame(&mut self, _: &mut World) -> Result<bool> {
+        pub fn next_frame(&mut self, _: &mut World) -> Result<bool> {
             unimplemented!()
         }
 
-        fn set_clear_color(&self, _: [f32; 4]) {
+        pub fn set_clear_color(&self, _: [f32; 4]) {
             unimplemented!()
         }
 
         // post process handling
-        fn add_post_processing_routine(&self, _post_process: Arc<dyn PostProcess>) {
+        pub fn add_render_routine<T: TScene>(&mut self, _priority: u32) {
             unimplemented!()
         }
 
-        fn remove_post_processing_routine(&self, _post_process: Arc<dyn PostProcess>) {
-            unimplemented!()
-        }
-
-        fn clear_post_processing_routines(&self) {
+        pub fn remove_render_routine<T: TScene>(&mut self) {
             unimplemented!()
         }
 
         // getter
-        fn image_count(&self) -> usize {
+        pub fn image_count(&self) -> usize {
             unimplemented!()
         }
 
-        fn images(&self) -> TargetMode<Vec<Arc<Image>>> {
+        pub fn images(&self) -> TargetMode<Vec<Arc<Image>>> {
             unimplemented!()
         }
 
-        fn width(&self) -> u32 {
+        pub fn width(&self) -> u32 {
             unimplemented!()
         }
 
-        fn height(&self) -> u32 {
+        pub fn height(&self) -> u32 {
             unimplemented!()
         }
 
-        fn transformations(&self) -> Option<(VRTransformations, VRTransformations)> {
+        pub fn transformations(&self) -> Option<(VRTransformations, VRTransformations)> {
             unimplemented!()
         }
     }