diff --git a/ROADMAP.txt b/ROADMAP.txt
index 7b10116..b022f86 100644
--- a/ROADMAP.txt
+++ b/ROADMAP.txt
@@ -1,10 +1,9 @@
 ------------ Tyra's v2.0 roadmap to publish on GitHub ------------
 
-- [Tutorials] 7
+- [Renderer] Add decimate to de_dust2
 - [Tutorials] 8
 - [Tutorials] 9.
 
-- [Renderer] Check ee clipping on de_dust2, add decimate to de_dust2?
 - [General] Check all left TODOs -> Github issues
 - [General] Readme Credits: clipping, obj loader
 - [Video] How to setup environment
diff --git a/engine/inc/renderer/3d/bbox/bbox.hpp b/engine/inc/renderer/3d/bbox/bbox.hpp
index 2a69efd..0cdeb3e 100644
--- a/engine/inc/renderer/3d/bbox/bbox.hpp
+++ b/engine/inc/renderer/3d/bbox/bbox.hpp
@@ -21,10 +21,10 @@ class BBox : public CoreBBox {
  public:
   BBox(const BBox& t_bbox);
   explicit BBox(CoreBBox** t_bboxes, const u32& count);
-  explicit BBox(Vec4* t_vertices, u32* faces, u32 t_count);
-  explicit BBox(Vec4* t_vertices, u32 t_count);
+  explicit BBox(const Vec4* t_vertices, const u32* faces, const u32& t_count);
+  explicit BBox(const Vec4* t_vertices, const u32& t_count);
   explicit BBox(const BBox& t_bbox, const M4x4& t_matrix);
-  explicit BBox(Vec4* t_vertices);
+  explicit BBox(const Vec4* t_vertices);
 
   static BBox create(const Vec4& center, const float& size);
 
diff --git a/engine/inc/renderer/3d/pipeline/static/core/bag/packaging/stapip_bag_package.hpp b/engine/inc/renderer/3d/pipeline/static/core/bag/packaging/stapip_bag_package.hpp
index 92e0c59..0c4cec4 100644
--- a/engine/inc/renderer/3d/pipeline/static/core/bag/packaging/stapip_bag_package.hpp
+++ b/engine/inc/renderer/3d/pipeline/static/core/bag/packaging/stapip_bag_package.hpp
@@ -32,11 +32,11 @@ class StaPipBagPackage {
   CoreBBoxFrustum isInFrustum;
 
   /**
-   * We are creating StaPipBagPackagesBBox which checks CoreBBoxBBox for every
+   * We are creating StaPipBagPackagesBBox which checks CoreBBox for every
    * maxVertCount / 3. So this variable is index of starting
-   * StaPipBagPackagesBBox's CoreBBoxBBox. If package have <= maxVertCount / 3
+   * StaPipBagPackagesBBox's CoreBBox. If package have <= maxVertCount / 3
    * verts, we will need only single (starting) bbox. if package have
-   * maxVertCount verts, we will calculate CoreBBoxBBox from 3
+   * maxVertCount verts, we will calculate CoreBBox from 3
    * StaPipBagPackagesBBox's bboxes.
    */
   u32 indexOf1By3BBox;
diff --git a/engine/inc/renderer/core/3d/bbox/core_bbox.hpp b/engine/inc/renderer/core/3d/bbox/core_bbox.hpp
index 26596a9..9c05911 100644
--- a/engine/inc/renderer/core/3d/bbox/core_bbox.hpp
+++ b/engine/inc/renderer/core/3d/bbox/core_bbox.hpp
@@ -24,9 +24,10 @@ class CoreBBox {
  public:
   CoreBBox();
   CoreBBox(const CoreBBox& t_bbox);
-  explicit CoreBBox(Vec4* t_vertices, u32* faces, u32 t_count);
-  explicit CoreBBox(Vec4* t_vertices, u32 t_count);
-  explicit CoreBBox(Vec4* t_vertices);
+  explicit CoreBBox(const Vec4* t_vertices, const u32* faces,
+                    const u32& t_count);
+  explicit CoreBBox(const Vec4* t_vertices, const u32& t_count);
+  explicit CoreBBox(const Vec4* t_vertices);
   explicit CoreBBox(CoreBBox** t_bboxes, const u32& count);
   explicit CoreBBox(const std::vector<CoreBBox>& t_bboxes,
                     const u32& startIndex, const u32& stopIndex);
diff --git a/engine/inc/renderer/core/3d/bbox/render_bbox.hpp b/engine/inc/renderer/core/3d/bbox/render_bbox.hpp
index f7d3e1c..4cd4b04 100644
--- a/engine/inc/renderer/core/3d/bbox/render_bbox.hpp
+++ b/engine/inc/renderer/core/3d/bbox/render_bbox.hpp
@@ -18,9 +18,10 @@ namespace Tyra {
 /** Bounding box */
 class RenderBBox : public CoreBBox {
  public:
-  explicit RenderBBox(Vec4* t_vertices, u32* faces, u32 t_count);
-  explicit RenderBBox(Vec4* t_vertices, u32 t_count);
-  explicit RenderBBox(Vec4* t_vertices);
+  explicit RenderBBox(const Vec4* t_vertices, const u32* faces,
+                      const u32& t_count);
+  explicit RenderBBox(const Vec4* t_vertices, const u32& t_count);
+  explicit RenderBBox(const Vec4* t_vertices);
   explicit RenderBBox(CoreBBox** t_bboxes, const u32& count);
   explicit RenderBBox(const std::vector<CoreBBox>& t_bboxes,
                       const u32& startIndex, const u32& stopIndex);
diff --git a/engine/src/renderer/3d/bbox/bbox.cpp b/engine/src/renderer/3d/bbox/bbox.cpp
index afb09c3..4c3b598 100644
--- a/engine/src/renderer/3d/bbox/bbox.cpp
+++ b/engine/src/renderer/3d/bbox/bbox.cpp
@@ -16,11 +16,12 @@ BBox::BBox(CoreBBox** t_bboxes, const u32& count) : CoreBBox(t_bboxes, count) {
   setData();
 }
 
-BBox::BBox(Vec4* t_vertices, u32 count) : CoreBBox(t_vertices, count) {
+BBox::BBox(const Vec4* t_vertices, const u32& count)
+    : CoreBBox(t_vertices, count) {
   setData();
 }
 
-BBox::BBox(Vec4* t_vertices, u32* faces, u32 count)
+BBox::BBox(const Vec4* t_vertices, const u32* faces, const u32& count)
     : CoreBBox(t_vertices, faces, count) {
   setData();
 }
@@ -32,7 +33,7 @@ BBox::BBox(const BBox& t_bbox, const M4x4& t_matrix)
   setData();
 }
 
-BBox::BBox(Vec4* t_vertices) : CoreBBox(t_vertices) { setData(); }
+BBox::BBox(const Vec4* t_vertices) : CoreBBox(t_vertices) { setData(); }
 
 BBox BBox::getTransformed(const M4x4& t_matrix) const {
   return BBox(*this, t_matrix);
diff --git a/engine/src/renderer/core/3d/bbox/core_bbox.cpp b/engine/src/renderer/core/3d/bbox/core_bbox.cpp
index 7c17b78..c668618 100644
--- a/engine/src/renderer/core/3d/bbox/core_bbox.cpp
+++ b/engine/src/renderer/core/3d/bbox/core_bbox.cpp
@@ -86,7 +86,7 @@ CoreBBox::CoreBBox(const std::vector<CoreBBox>& t_bboxes, const u32& startIndex,
   vertices[7].set(hiX, hiY, hiZ);
 }
 
-CoreBBox::CoreBBox(Vec4* t_vertices, u32* faces, u32 count) {
+CoreBBox::CoreBBox(const Vec4* t_vertices, const u32* faces, const u32& count) {
   float lowX, lowY, lowZ, hiX, hiY, hiZ;
   lowX = hiX = t_vertices[faces[0]].x;
   lowY = hiY = t_vertices[faces[0]].y;
@@ -113,7 +113,7 @@ CoreBBox::CoreBBox(Vec4* t_vertices, u32* faces, u32 count) {
   vertices[7].set(hiX, hiY, hiZ);
 }
 
-CoreBBox::CoreBBox(Vec4* t_vertices, u32 count) {
+CoreBBox::CoreBBox(const Vec4* t_vertices, const u32& count) {
   float lowX, lowY, lowZ, hiX, hiY, hiZ;
   lowX = hiX = t_vertices[0].x;
   lowY = hiY = t_vertices[0].y;
@@ -159,7 +159,7 @@ void CoreBBox::operator=(const CoreBBox& v) {
   for (auto i = 0; i < 8; i++) Vec4::copy(&vertices[i], v.vertices[i].xyzw);
 }
 
-CoreBBox::CoreBBox(Vec4* t_vertices) {
+CoreBBox::CoreBBox(const Vec4* t_vertices) {
   for (auto i = 0; i < 8; i++) Vec4::copy(&vertices[i], t_vertices[i].xyzw);
 }
 
diff --git a/engine/src/renderer/core/3d/bbox/render_bbox.cpp b/engine/src/renderer/core/3d/bbox/render_bbox.cpp
index 3dd27b5..c97c458 100644
--- a/engine/src/renderer/core/3d/bbox/render_bbox.cpp
+++ b/engine/src/renderer/core/3d/bbox/render_bbox.cpp
@@ -21,13 +21,14 @@ RenderBBox::RenderBBox(const std::vector<CoreBBox>& t_bboxes,
                        const u32& startIndex, const u32& stopIndex)
     : CoreBBox(t_bboxes, startIndex, stopIndex) {}
 
-RenderBBox::RenderBBox(Vec4* t_vertices, u32* faces, u32 count)
+RenderBBox::RenderBBox(const Vec4* t_vertices, const u32* faces,
+                       const u32& count)
     : CoreBBox(t_vertices, faces, count) {}
 
-RenderBBox::RenderBBox(Vec4* t_vertices, u32 count)
+RenderBBox::RenderBBox(const Vec4* t_vertices, const u32& count)
     : CoreBBox(t_vertices, count) {}
 
-RenderBBox::RenderBBox(Vec4* t_vertices) : CoreBBox(t_vertices) {}
+RenderBBox::RenderBBox(const Vec4* t_vertices) : CoreBBox(t_vertices) {}
 
 RenderBBox::RenderBBox(const RenderBBox& t_bbox, const M4x4& t_matrix)
     : CoreBBox(t_bbox, t_matrix) {}
@@ -64,6 +65,6 @@ CoreBBoxFrustum RenderBBox::clipFrustumCheck(const Plane* frustumPlanes,
   guardBand[5] = -10.0F;  // FAR
 
   return frustumCheck(frustumPlanes, model, guardBand);  // Let's check it again
-}  // namespace Tyra
+}
 
 }  // namespace Tyra