diff --git a/src/ui/debug_menu.cpp b/src/ui/debug_menu.cpp
index 751c8ca3..0cb3d178 100644
--- a/src/ui/debug_menu.cpp
+++ b/src/ui/debug_menu.cpp
@@ -393,7 +393,7 @@ bool CDebugMenu::EventProcess(const Event &event)
 
 bool CDebugMenu::HandleSpawnObject(ObjectType type, const glm::vec2& mousePos)
 {
-    Math::Vector pos;
+    glm::vec3 pos;
     if (m_engine->DetectObject(mousePos, pos, true) == -1)
     {
         m_sound->Play(SOUND_CLICK, 1.0f, 0.5f);
@@ -416,7 +416,7 @@ bool CDebugMenu::HandleSpawnObject(ObjectType type, const glm::vec2& mousePos)
 
 bool CDebugMenu::HandleLightning(const glm::vec2& mousePos)
 {
-    Math::Vector pos;
+    glm::vec3 pos;
     if (m_engine->DetectObject(mousePos, pos, true) == -1)
     {
         m_sound->Play(SOUND_CLICK, 1.0f, 0.5f);
@@ -432,7 +432,7 @@ bool CDebugMenu::HandleTeleport(const glm::vec2& mousePos)
 {
     CObject* select = m_main->GetSelect();
 
-    Math::Vector pos;
+    glm::vec3 pos;
     if (m_engine->DetectObject(mousePos, pos, true) == -1 || !m_engine->GetTerrain()->AdjustToFloor(pos) || select == nullptr)
     {
         m_sound->Play(SOUND_CLICK, 1.0f, 0.5f);
@@ -455,7 +455,7 @@ bool CDebugMenu::HandleTeleport(const glm::vec2& mousePos)
 void CDebugMenu::HandleFrameUpdate(const Event &event)
 {
     std::string str = "-";
-    Math::Vector pos;
+    glm::vec3 pos;
     int obj;
     if ((obj = m_engine->DetectObject(event.mousePos, pos, true)) != -1)
         str = StrUtils::Format("pos=% 3.2f; % 3.2f    height=% 3.2f    objId=% 4d", pos.x, pos.z, pos.y, obj);
@@ -467,7 +467,7 @@ void CDebugMenu::HandleFrameUpdate(const Event &event)
 
 bool CDebugMenu::HandleCopy(const glm::vec2& mousePos)
 {
-    Math::Vector pos;
+    glm::vec3 pos;
     if (m_engine->DetectObject(mousePos, pos, true) == -1)
     {
         m_sound->Play(SOUND_CLICK, 1.0f, 0.5f);
diff --git a/src/ui/displayinfo.cpp b/src/ui/displayinfo.cpp
index 588a6f6f..eb56b7d8 100644
--- a/src/ui/displayinfo.cpp
+++ b/src/ui/displayinfo.cpp
@@ -457,7 +457,7 @@ void CDisplayInfo::StartDisplayInfo(std::string filename, int index, bool bSoluc
     light.type    = Gfx::LIGHT_DIRECTIONAL;
     light.ambient = Gfx::Color(0.0f, 0.0f, 0.0f);
     light.diffuse = Gfx::Color(1.0f, 0.1f, 0.1f);
-    light.direction  = Math::Vector(1.0f, 0.0f, 1.0f);
+    light.direction  = glm::vec3(1.0f, 0.0f, 1.0f);
 
     m_lightSuppl = m_light->CreateLight();
     m_light->SetLight(m_lightSuppl, light);
diff --git a/src/ui/displaytext.cpp b/src/ui/displaytext.cpp
index d734b5ea..a890d1ad 100644
--- a/src/ui/displaytext.cpp
+++ b/src/ui/displaytext.cpp
@@ -123,7 +123,7 @@ void CDisplayText::DisplayError(Error err, CObject* pObj, float time)
     if (pObj == nullptr)
         return;
 
-    Math::Vector pos = pObj->GetPosition();
+    glm::vec3 pos = pObj->GetPosition();
     float h = GetIdealHeight(pObj);
     float d = GetIdealDist(pObj);
     DisplayError(err, pos, h, d, time);
@@ -131,7 +131,7 @@ void CDisplayText::DisplayError(Error err, CObject* pObj, float time)
 
 // Displays an error.
 
-void CDisplayText::DisplayError(Error err, Math::Vector goal, float height,
+void CDisplayText::DisplayError(Error err, glm::vec3 goal, float height,
                                 float dist, float time)
 {
     if ( err == ERR_OK )  return;
@@ -162,7 +162,7 @@ void CDisplayText::DisplayText(const char *text, CObject* pObj,
 {
     if (pObj == nullptr)  return;
 
-    Math::Vector pos = pObj->GetPosition();
+    glm::vec3 pos = pObj->GetPosition();
     float h = GetIdealHeight(pObj);
     float d = GetIdealDist(pObj);
     DisplayText(text, pos, h, d, time, type);
@@ -170,7 +170,7 @@ void CDisplayText::DisplayText(const char *text, CObject* pObj,
 
 // Displays text.
 
-void CDisplayText::DisplayText(const char *text, Math::Vector goal, float height,
+void CDisplayText::DisplayText(const char *text, glm::vec3 goal, float height,
                                float dist, float time, TextType type)
 {
     CObject*    toto;
@@ -421,10 +421,10 @@ void CDisplayText::SetEnable(bool bEnable)
 
 // Returns the goal during a visit.
 
-Math::Vector CDisplayText::GetVisitGoal(EventType event)
+glm::vec3 CDisplayText::GetVisitGoal(EventType event)
 {
     int i = event - EVENT_DT_VISIT0;
-    if (i < 0 || i >= MAXDTLINE)  return Math::Vector(0.0f, 0.0f, 0.0f);
+    if (i < 0 || i >= MAXDTLINE)  return glm::vec3(0.0f, 0.0f, 0.0f);
     return m_textLines[i].visitGoal;
 }
 
diff --git a/src/ui/displaytext.h b/src/ui/displaytext.h
index de6d8e4e..21594a45 100644
--- a/src/ui/displaytext.h
+++ b/src/ui/displaytext.h
@@ -59,16 +59,16 @@ public:
     bool        EventProcess(const Event &event);
 
     void        DisplayError(Error err, CObject* pObj, float time=10.0f);
-    void        DisplayError(Error err, Math::Vector goal, float height=15.0f, float dist=60.0f, float time=10.0f);
+    void        DisplayError(Error err, glm::vec3 goal, float height=15.0f, float dist=60.0f, float time=10.0f);
     void        DisplayText(const char *text, CObject* pObj, float time=10.0f, TextType type=TT_INFO);
-    void        DisplayText(const char *text, Math::Vector goal, float height=15.0f, float dist=60.0f, float time=10.0f, TextType type=TT_INFO);
+    void        DisplayText(const char *text, glm::vec3 goal, float height=15.0f, float dist=60.0f, float time=10.0f, TextType type=TT_INFO);
     void        HideText(bool bHide);
     void        ClearText();
     bool        ClearLastText();
     void        SetDelay(float factor);
     void        SetEnable(bool bEnable);
 
-    Math::Vector    GetVisitGoal(EventType event);
+    glm::vec3   GetVisitGoal(EventType event);
     float       GetVisitDist(EventType event);
     float       GetVisitHeight(EventType event);
 
@@ -91,7 +91,7 @@ protected:
     {
         bool exist = false;
         float time = 0.0f;
-        Math::Vector visitGoal;
+        glm::vec3 visitGoal = { 0, 0, 0 };
         float visitDist = 0.0f;
         float visitHeight = 0.0f;
     };
diff --git a/src/ui/maindialog.cpp b/src/ui/maindialog.cpp
index f94c578c..62861402 100644
--- a/src/ui/maindialog.cpp
+++ b/src/ui/maindialog.cpp
@@ -404,7 +404,7 @@ void CMainDialog::StartDialog(const glm::vec2& dim, bool fireParticles)
 void CMainDialog::FrameDialog(float rTime)
 {
     CWindow*    pw;
-    Math::Vector    pos, speed;
+    glm::vec3    pos, speed;
     glm::vec2   dim, dpos, ddim;
     float       zoom;
     int         i;
@@ -452,7 +452,7 @@ void CMainDialog::FrameDialog(float rTime)
     ddim = m_dialogDim;
 
     pos.z = 0.0f;
-    speed = Math::Vector(0.0f, 0.0f, 0.0f);
+    speed = glm::vec3(0.0f, 0.0f, 0.0f);
 
     for ( i=0 ; i<2 ; i++ )
     {
diff --git a/src/ui/mainui.cpp b/src/ui/mainui.cpp
index 649886ee..88720589 100644
--- a/src/ui/mainui.cpp
+++ b/src/ui/mainui.cpp
@@ -424,9 +424,9 @@ void CMainUserInterface::GlintMove()
 
 // Returns the position for a sound.
 
-static Math::Vector SoundPos(const glm::vec2& pos)
+static glm::vec3 SoundPos(const glm::vec2& pos)
 {
-    Math::Vector    s;
+    glm::vec3    s;
 
     s.x = (pos.x-0.5f)*2.0f;
     s.y = (pos.y-0.5f)*2.0f;
@@ -437,9 +437,9 @@ static Math::Vector SoundPos(const glm::vec2& pos)
 
 // Returns a random position for a sound.
 
-static Math::Vector SoundRand()
+static glm::vec3 SoundRand()
 {
-    Math::Vector    s;
+    glm::vec3    s;
 
     s.x = (Math::Rand()-0.5f)*2.0f;
     s.y = (Math::Rand()-0.5f)*2.0f;
@@ -452,7 +452,7 @@ static Math::Vector SoundRand()
 
 void CMainUserInterface::FrameParticle(float rTime)
 {
-    Math::Vector    pos, speed;
+    glm::vec3    pos, speed;
     glm::vec2     dim;
     float       *pParti, *pGlint;
     int          nParti,  nGlint;
diff --git a/src/ui/object_interface.cpp b/src/ui/object_interface.cpp
index 3690b2c8..b2c75985 100644
--- a/src/ui/object_interface.cpp
+++ b/src/ui/object_interface.cpp
@@ -761,7 +761,7 @@ void CObjectInterface::StopEditScript(bool closeWithErrors)
 
 void CObjectInterface::GroundFlat()
 {
-    Math::Vector    pos, speed;
+    glm::vec3    pos, speed;
     glm::vec2     dim;
     Error       err;
     float       level;
@@ -781,7 +781,7 @@ void CObjectInterface::GroundFlat()
 
     level = m_terrain->GetFloorLevel(pos)+2.0f;
     if ( pos.y < level )  pos.y = level;  // not below the soil
-    speed = Math::Vector(0.0f, 0.0f, 0.0f);
+    speed = glm::vec3(0.0f, 0.0f, 0.0f);
     dim.x = 40.0f;
     dim.y = dim.x;
     m_particle->CreateParticle(pos, speed, dim, Gfx::PARTIGFLAT, 1.0f);
@@ -1546,7 +1546,7 @@ void CObjectInterface::UpdateInterface(float rTime)
     CButton*    pb;
     CGroup*     pgr;
     CTarget*    ptg;
-    Math::Vector    pos, hPos;
+    glm::vec3    pos, hPos;
     glm::vec2     ppos;
     float       range;
     int         icon;
diff --git a/src/ui/particles_generator.cpp b/src/ui/particles_generator.cpp
index 91c34100..7d7aa651 100644
--- a/src/ui/particles_generator.cpp
+++ b/src/ui/particles_generator.cpp
@@ -31,7 +31,7 @@ namespace UI
     void CParticlesGenerator::GenerateMouseParticles(const glm::vec2& mousePosition, bool buttonPressed)
     {
         Gfx::ParticleType particleType = buttonPressed ? Gfx::ParticleType::PARTISCRAPS : Gfx::ParticleType::PARTILENS1;
-        m_particleManager->CreateParticle(Math::Vector(mousePosition.x, mousePosition.y, 0), CreateRandomSpeedForMouseParticles(),
+        m_particleManager->CreateParticle(glm::vec3(mousePosition.x, mousePosition.y, 0), CreateRandomSpeedForMouseParticles(),
             CreateRandomDimensionsForMouseParticles(buttonPressed), particleType,
             CreateRandomDurationForMouseParticles(), 2.0f, 0.0f, Gfx::SH_INTERFACE);
     }
@@ -42,9 +42,9 @@ namespace UI
         return { dimensionX, dimensionX / 0.75f };
     }
 
-    Math::Vector CParticlesGenerator::CreateRandomSpeedForMouseParticles()
+    glm::vec3 CParticlesGenerator::CreateRandomSpeedForMouseParticles()
     {
-        return Math::Vector((Math::Rand() - 0.5f) * 0.5f, 0.3f + Math::Rand() * 0.3f, 0.0f);
+        return glm::vec3((Math::Rand() - 0.5f) * 0.5f, 0.3f + Math::Rand() * 0.3f, 0.0f);
     }
 
     float CParticlesGenerator::CreateRandomDurationForMouseParticles()
diff --git a/src/ui/particles_generator.h b/src/ui/particles_generator.h
index ee8bfbc8..e067befa 100644
--- a/src/ui/particles_generator.h
+++ b/src/ui/particles_generator.h
@@ -21,7 +21,7 @@
 
 #include "graphics/engine/particle.h"
 
-#include "math/vector.h"
+#include <glm/glm.hpp>
 
 namespace UI
 {
@@ -39,7 +39,7 @@ namespace UI
     private:
         Gfx::CParticle* m_particleManager;
         glm::vec2 CreateRandomDimensionsForMouseParticles(bool buttonPressed);
-        Math::Vector CreateRandomSpeedForMouseParticles();
+        glm::vec3 CreateRandomSpeedForMouseParticles();
         float CreateRandomDurationForMouseParticles();
     };
 
diff --git a/src/ui/screen/screen_apperance.cpp b/src/ui/screen/screen_apperance.cpp
index fc050947..062a5efa 100644
--- a/src/ui/screen/screen_apperance.cpp
+++ b/src/ui/screen/screen_apperance.cpp
@@ -704,14 +704,14 @@ void CScreenApperance::SetCamera(float x, float y, float cameraDistance)
 
     camera->SetType(Gfx::CAM_TYPE_SCRIPT);
 
-    Math::Vector p2D(x, y, cameraDistance);
-    Math::Vector p3D;
+    glm::vec3 p2D(x, y, cameraDistance);
+    glm::vec3 p3D{};
     Math::Matrix matView;
     Math::Matrix matProj = engine->GetMatProj();
 
-    Math::LoadViewMatrix(matView, Math::Vector(0.0f, 0.0f, -cameraDistance),
-                            Math::Vector(0.0f, 0.0f, 0.0f),
-                            Math::Vector(0.0f, 0.0f, 1.0f));
+    Math::LoadViewMatrix(matView, glm::vec3(0.0f, 0.0f, -cameraDistance),
+                            glm::vec3(0.0f, 0.0f, 0.0f),
+                            glm::vec3(0.0f, 0.0f, 1.0f));
 
     p2D.x = p2D.x * 2.0f - 1.0f;  // [0..1] -> [-1..1]
     p2D.y = p2D.y * 2.0f - 1.0f;
@@ -723,8 +723,8 @@ void CScreenApperance::SetCamera(float x, float y, float cameraDistance)
     p3D = Math::Transform(matView.Inverse(), p3D);
     p3D = -p3D;
 
-    camera->SetScriptCamera(Math::Vector(cameraDistance, p3D.y, p3D.x),
-                            Math::Vector(0.0f, p3D.y, p3D.x));
+    camera->SetScriptCamera(glm::vec3(cameraDistance, p3D.y, p3D.x),
+                            glm::vec3(0.0f, p3D.y, p3D.x));
 }
 
 } // namespace Ui