diff --git a/Projects/Skylicht/Collision/Source/Decal/CDecalsRenderer.cpp b/Projects/Skylicht/Collision/Source/Decal/CDecalsRenderer.cpp
index 82912858c..06ed8ef37 100644
--- a/Projects/Skylicht/Collision/Source/Decal/CDecalsRenderer.cpp
+++ b/Projects/Skylicht/Collision/Source/Decal/CDecalsRenderer.cpp
@@ -147,7 +147,7 @@ namespace Skylicht
 		r1.rotationFromTo(core::vector3df(0.0f, 1.0f, 0.0f), decal->Normal);
 
 		core::quaternion r2;
-		r2.fromAngleAxis(-decal->TextureRotation * core::DEGTORAD, core::vector3df(0.0f, 1.0f, 0.0f));
+		r2.fromAngleAxis(decal->TextureRotation * core::DEGTORAD, core::vector3df(0.0f, 1.0f, 0.0f));
 
 		core::quaternion q = r2 * r1;
 
@@ -178,17 +178,21 @@ namespace Skylicht
 			uvMatrix.transformVect(uvTriangle.pointB);
 			uvMatrix.transformVect(uvTriangle.pointC);
 
-
 			// Fill vertices and indices
 			{
 				video::SColor color(255, 255, 255, 255);
 
 				for (u32 p = 0; p < 3; p++)
 				{
-					core::vector3df uvPos = uvTriangle.pointA * uvScale + uvOffset;
-					core::vector3df pos = triangle.pointA;
+					core::vector3df uvPos;
+					core::vector3df pos;
 
-					if (p == 1)
+					if (p == 0)
+					{
+						uvPos = uvTriangle.pointA * uvScale + uvOffset;
+						pos = triangle.pointA;
+					}
+					else if (p == 1)
 					{
 						uvPos = uvTriangle.pointB * uvScale + uvOffset;
 						pos = triangle.pointB;
diff --git a/Samples/Collision/Source/CViewDemo.cpp b/Samples/Collision/Source/CViewDemo.cpp
index 8feca2dfd..937680e91 100644
--- a/Samples/Collision/Source/CViewDemo.cpp
+++ b/Samples/Collision/Source/CViewDemo.cpp
@@ -59,7 +59,7 @@ bool CViewDemo::OnEvent(const SEvent& event)
 		m_mouseX = (float)event.MouseInput.X;
 		m_mouseY = (float)event.MouseInput.Y;
 
-		if (event.MouseInput.isLeftPressed())
+		if (event.MouseInput.Event == EMIE_LMOUSE_LEFT_UP)
 		{
 			// press
 			if (m_currentTest == 2)
@@ -116,7 +116,7 @@ void CViewDemo::onUpdate()
 			box.MaxEdge = intersection + halfBox;
 			sceneDebug->addBoudingBox(box, SColor(255, 0, 255, 0));
 
-			// query
+			// query triangles
 			core::array<core::triangle3df*> listTris;
 			core::array<CCollisionNode*> listNodes;
 
@@ -133,7 +133,7 @@ void CViewDemo::onUpdate()
 			core::vector3df normal = triangle.getNormal();
 			normal.normalize();
 
-			// draw bbox query
+			// draw decal projection box
 			core::aabbox3df box;
 			core::vector3df halfBox = core::vector3df(m_decalSizeX * 0.5f, m_decalSizeY * 0.5f, m_decalSizeZ * 0.5f);
 			box.MinEdge = -halfBox;
@@ -143,7 +143,7 @@ void CViewDemo::onUpdate()
 			r1.rotationFromTo(core::vector3df(0.0f, 1.0f, 0.0f), normal);
 
 			core::quaternion r2;
-			r2.fromAngleAxis(-m_decalRotation * core::DEGTORAD, core::vector3df(0.0f, 1.0f, 0.0f));
+			r2.fromAngleAxis(m_decalRotation * core::DEGTORAD, core::vector3df(0.0f, 1.0f, 0.0f));
 
 			core::quaternion q = r2 * r1;