diff --git a/PBRWithSpecular.png b/PBRWithSpecular.png
new file mode 100644
index 0000000..0e53c98
--- /dev/null
+++ b/PBRWithSpecular.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:270534bcbb4a3a28e20401b876e09c377d87d2e3eef46dc8b74776d70d0a0c1f
+size 650871
diff --git a/Shaders/BRDFIntegration.fs b/Shaders/BRDFIntegration.fs
new file mode 100644
index 0000000..644795f
--- /dev/null
+++ b/Shaders/BRDFIntegration.fs
@@ -0,0 +1,111 @@
+#version 460 core
+out vec2 FragColor;
+in vec2 TexCoords;
+
+
+const float PI = 3.14159265359;
+
+
+// http://holger.dammertz.org/stuff/notes_HammersleyOnHemisphere.html
+// efficient VanDerCorpus calculation.
+float RadicalInverse_VdC(uint bits) 
+{
+     bits = (bits << 16u) | (bits >> 16u);
+     bits = ((bits & 0x55555555u) << 1u) | ((bits & 0xAAAAAAAAu) >> 1u);
+     bits = ((bits & 0x33333333u) << 2u) | ((bits & 0xCCCCCCCCu) >> 2u);
+     bits = ((bits & 0x0F0F0F0Fu) << 4u) | ((bits & 0xF0F0F0F0u) >> 4u);
+     bits = ((bits & 0x00FF00FFu) << 8u) | ((bits & 0xFF00FF00u) >> 8u);
+     return float(bits) * 2.3283064365386963e-10; // / 0x100000000
+}
+
+vec2 Hammersley(uint i, uint N)
+{
+	return vec2(float(i)/float(N), RadicalInverse_VdC(i));
+}
+
+float GeometrySchlickGGX(float NdotV, float roughness)
+{
+    float a = roughness;
+    float k = (a * a) / 2.0;
+
+    float nom   = NdotV;
+    float denom = NdotV * (1.0 - k) + k;
+
+    return nom / denom;
+}
+
+vec3 ImportanceSampleGGX(vec2 Xi, vec3 N, float roughness){
+    float a = roughness*roughness;
+
+    float phi = 2.0 * PI * Xi.x;
+    float cosTheta = sqrt((1.0 - Xi.y) / (1.0 + (a*a - 1.0) * Xi.y));
+    float sinTheta = sqrt(1.0 - cosTheta*cosTheta);
+
+    // Spherical to cartesian
+    vec3 H;
+    H.x = cos(phi) * sinTheta;
+    H.y = sin(phi) * sinTheta;
+    H.z = cosTheta;
+
+    // tangent space to world sample vector
+    vec3 up = abs(N.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(1.0, 0.0, 0.0);
+    vec3 tangent = normalize(cross(up,N));
+    vec3 bitangent = cross(N, tangent);
+    vec3 sampleVec = tangent * H.x + bitangent * H.y + N * H.z;
+
+    return normalize(sampleVec);
+}
+
+
+float GeometrySmith(vec3 N, vec3 V, vec3 L, float roughness)
+{
+    float NdotV = max(dot(N, V), 0.0);
+    float NdotL = max(dot(N, L), 0.0);
+    float ggx2 = GeometrySchlickGGX(NdotV, roughness);
+    float ggx1 = GeometrySchlickGGX(NdotL, roughness);
+
+    return ggx1 * ggx2;
+}  
+
+vec2 IntegrateBRDF (float NdotV, float roughness){
+
+    vec3 V;
+    V.x = sqrt(1.0 - NdotV * NdotV);
+    V.y = 0.0;
+    V.z = NdotV;
+
+    float A = 0.0;
+    float B = 0.0;
+    
+    vec3 N = vec3(0.0,0.0,1.0);
+
+    const uint SAMPLE_COUNT = 1024u;
+    for(uint i = 0u; i < SAMPLE_COUNT; ++i){
+       vec2 Xi = Hammersley(i, SAMPLE_COUNT);
+        vec3 H  = ImportanceSampleGGX(Xi, N, roughness);
+        vec3 L  = normalize(2.0 * dot(V, H) * H - V);
+
+        float NdotL = max(L.z, 0.0);
+        float NdotH = max(H.z, 0.0);
+        float VdotH = max(dot(V, H), 0.0);
+
+        if(NdotL > 0.0)
+        {
+            float G = GeometrySmith(N, V, L, roughness);
+            float G_Vis = (G * VdotH) / (NdotH * NdotV);
+            float Fc = pow(1.0 - VdotH, 5.0);
+
+            A += (1.0 - Fc) * G_Vis;
+            B += Fc * G_Vis;
+        }
+    }
+    A /= float(SAMPLE_COUNT);
+    B /= float(SAMPLE_COUNT);
+    return vec2(A, B);
+}
+
+void main() 
+{
+    vec2 integratedBRDF = IntegrateBRDF(TexCoords.x, TexCoords.y);
+    FragColor = integratedBRDF;
+}
diff --git a/Shaders/BRDFIntegration.vs b/Shaders/BRDFIntegration.vs
new file mode 100644
index 0000000..0bc4e1a
--- /dev/null
+++ b/Shaders/BRDFIntegration.vs
@@ -0,0 +1,10 @@
+#version 460 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec2 aTexCoords;
+
+out vec2 TexCoords;
+
+void main(){
+    TexCoords = aTexCoords;
+    gl_Position = vec4(aPos, 1.0);
+}
\ No newline at end of file
diff --git a/Shaders/HDRSkybox.fs b/Shaders/HDRSkybox.fs
index 12afac5..45c4886 100644
--- a/Shaders/HDRSkybox.fs
+++ b/Shaders/HDRSkybox.fs
@@ -7,7 +7,6 @@ uniform samplerCube environmentMap;
 
 void main(){
     vec3 envColor = texture(environmentMap, localPos).rgb;
-
     envColor = envColor /(envColor + vec3(1.0));
     envColor = pow(envColor, vec3(1.0/2.2));
 
diff --git a/Shaders/pbr.fs b/Shaders/pbr.fs
index 254393b..649b22f 100644
--- a/Shaders/pbr.fs
+++ b/Shaders/pbr.fs
@@ -12,9 +12,12 @@ uniform sampler2D metallicMap;
 uniform sampler2D normalMap;
 uniform sampler2D roughnessMap;
 uniform sampler2D aoMap;
-uniform samplerCube irradianceMap;
 
 
+uniform samplerCube irradianceMap;
+uniform samplerCube prefilterMap;
+uniform sampler2D brdfLUT;
+
 uniform vec3 lightPositions[4];
 uniform vec3 lightColors[4];
 
@@ -78,6 +81,8 @@ vec3 getNormalFromNormalMap(){
     return normalize(TBN * tangentNormal);
 }
 
+
+
 void main(){
 
     vec3 albedo = pow(texture(albedoMap, TexCoords).rgb, vec3(2.2));
@@ -88,7 +93,9 @@ void main(){
 
     vec3 N = getNormalFromNormalMap();
     vec3 V = normalize(camPos - WorldPos);
-    
+    vec3 R = reflect(-V, N);
+
+
     vec3 F0 = vec3(0.04);
     F0 = mix(F0, albedo, metallic);
 
@@ -128,7 +135,15 @@ void main(){
     kD *= 1.0 - metallic;
     vec3 irradiance = texture(irradianceMap, N).rgb;
     vec3 diffuse = irradiance* albedo;
-    vec3 ambient = (kD * diffuse) * ao;
+
+    const float MAX_REFLECTION_LOD = 4.0;
+    vec3 prefilterColor = textureLod(prefilterMap, R, roughness * MAX_REFLECTION_LOD).rgb;
+    vec2 envBRDF = texture(brdfLUT, vec2(max(dot(N,V), 0.0), roughness)).rg;
+    vec3 specular = prefilterColor * (kS * envBRDF.x + envBRDF.y);
+
+
+
+    vec3 ambient = (kD * diffuse + specular) * ao;
     vec3 color = ambient + Lo;
 
     // HDR tonemapping
diff --git a/Shaders/prefilter.fs b/Shaders/prefilter.fs
new file mode 100644
index 0000000..ad228ce
--- /dev/null
+++ b/Shaders/prefilter.fs
@@ -0,0 +1,71 @@
+#version 460 core
+out vec4 FragColor;
+in vec3 localPos;
+
+uniform samplerCube environmentMap;
+uniform float roughness;
+
+const float PI = 3.14159265359;
+
+vec3 ImportanceSampleGGX(vec2 Xi, vec3 N, float roughness){
+    float a = roughness*roughness;
+
+    float phi = 2.0 * PI * Xi.x;
+    float cosTheta = sqrt((1.0 - Xi.y) / (1.0 + (a*a - 1.0) * Xi.y));
+    float sinTheta = sqrt(1.0 - cosTheta*cosTheta);
+
+    // Spherical to cartesian
+    vec3 H;
+    H.x = cos(phi) * sinTheta;
+    H.y = sin(phi) * sinTheta;
+    H.z = cosTheta;
+
+    // tangent space to world sample vector
+    vec3 up = abs(N.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(1.0, 0.0, 0.0);
+    vec3 tangent = normalize(cross(up,N));
+    vec3 bitangent = cross(N, tangent);
+    vec3 sampleVec = tangent * H.x + bitangent * H.y + N * H.z;
+
+    return normalize(sampleVec);
+}
+
+
+// Generate Van Der Corput sequence
+float RadicalInverse_VdC(uint bits){
+    bits = (bits << 16u) | (bits >> 16u);
+    bits = ((bits & 0x55555555u) << 1u) | ((bits & 0xAAAAAAAAu) >> 1u);
+    bits = ((bits & 0x33333333u) << 2u) | ((bits & 0xCCCCCCCCu) >> 2u);
+    bits = ((bits & 0x0F0F0F0Fu) << 4u) | ((bits & 0xF0F0F0F0u) >> 4u);
+    bits = ((bits & 0x00FF00FFu) << 8u) | ((bits & 0xFF00FF00u) >> 8u);
+    return float(bits) * 2.3283064365386963e-10; // / 0x100000000
+}
+
+vec2 Hammersley(uint i, uint N){
+    return vec2(float(i)/float(N), RadicalInverse_VdC(i));
+}
+
+void main(){
+    vec3 N = normalize(localPos);
+    vec3 R = N;
+    vec3 V = R;
+    
+    const uint SAMPLE_COUNT = 1024u;
+    float totalWeight = 0.0;
+    vec3 prefilteredColor = vec3(0.0);
+    for(uint i = 0u; i < SAMPLE_COUNT; ++i)
+    {
+        vec2 Xi = Hammersley(i, SAMPLE_COUNT);
+        vec3 H = ImportanceSampleGGX(Xi, N, roughness);
+        vec3 L = normalize(2.0 * dot(V,H) * H - V );
+
+        float NdotL = max(dot(N, L), 0.0);
+        if(NdotL > 0.0){
+            prefilteredColor += texture(environmentMap, L).rgb * NdotL;
+            totalWeight += NdotL;
+        }
+    }
+
+    prefilteredColor = prefilteredColor / totalWeight;
+
+    FragColor = vec4(prefilteredColor, 1.0);
+}
\ No newline at end of file
diff --git a/Textures/Iron-Scuffed/albedo.png b/Textures/Iron-Scuffed/albedo.png
new file mode 100644
index 0000000..e731499
--- /dev/null
+++ b/Textures/Iron-Scuffed/albedo.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d10d3f3667099909184086588c6bf92b26fae83d6eb70e689f37941cf5ef0177
+size 19629
diff --git a/Textures/Iron-Scuffed/ao.png b/Textures/Iron-Scuffed/ao.png
new file mode 100644
index 0000000..8d28e72
--- /dev/null
+++ b/Textures/Iron-Scuffed/ao.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:239842079db09bd951d2c79c779a2b1b89ebf7212dfbb637519afb6d0dddde98
+size 13026
diff --git a/Textures/Iron-Scuffed/metallic.png b/Textures/Iron-Scuffed/metallic.png
new file mode 100644
index 0000000..3fcaecd
--- /dev/null
+++ b/Textures/Iron-Scuffed/metallic.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8a532bf8dfc6ca8e6c486f81708121ea693b3d8729e50e70c8b6664de13bec60
+size 7859
diff --git a/Textures/Iron-Scuffed/normal.png b/Textures/Iron-Scuffed/normal.png
new file mode 100644
index 0000000..c3c74ba
--- /dev/null
+++ b/Textures/Iron-Scuffed/normal.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:471139bc8d36dbb62cdbd35c6c471046f5151783eb53e7ee8c05d4019e28c507
+size 27098
diff --git a/Textures/Iron-Scuffed/roughness.png b/Textures/Iron-Scuffed/roughness.png
new file mode 100644
index 0000000..9a32835
--- /dev/null
+++ b/Textures/Iron-Scuffed/roughness.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:cf425de69daa965b8cabfd8e4430b4b7bb58b949cadf32ff746226b158b6919f
+size 1762692
diff --git a/Textures/beaten-down-brick/albedo.png b/Textures/beaten-down-brick/albedo.png
new file mode 100644
index 0000000..4a1c848
--- /dev/null
+++ b/Textures/beaten-down-brick/albedo.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0b5eb12c0c38ee7ea89a8f06168262793a252f7ba144b78cea687be90f4bb569
+size 5853266
diff --git a/Textures/beaten-down-brick/ao.png b/Textures/beaten-down-brick/ao.png
new file mode 100644
index 0000000..c636152
--- /dev/null
+++ b/Textures/beaten-down-brick/ao.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3ca8b8dc0a548b64e5475387adca12803fe7cfac8bf9c139be28b59dea5a3fe6
+size 1134309
diff --git a/Textures/beaten-down-brick/beaten-down-brick_height.png b/Textures/beaten-down-brick/beaten-down-brick_height.png
new file mode 100644
index 0000000..6775229
--- /dev/null
+++ b/Textures/beaten-down-brick/beaten-down-brick_height.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4d4639cc085308d3b9cfb3c9cc72eed76dcd8c5bcaf73601ae7747c06fdde265
+size 1261444
diff --git a/Textures/beaten-down-brick/metallic.png b/Textures/beaten-down-brick/metallic.png
new file mode 100644
index 0000000..57ee52c
--- /dev/null
+++ b/Textures/beaten-down-brick/metallic.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:853c74cbddd9365725ee0f8e419931080c72fbb1f0be9eb70292e66327868198
+size 56038
diff --git a/Textures/beaten-down-brick/normal.png b/Textures/beaten-down-brick/normal.png
new file mode 100644
index 0000000..21b6708
--- /dev/null
+++ b/Textures/beaten-down-brick/normal.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:be5b02a5f348df55eaf580ceac7efc60e6269ac7c2ff857e9d9f74300f34c16e
+size 8317624
diff --git a/Textures/beaten-down-brick/roughness.png b/Textures/beaten-down-brick/roughness.png
new file mode 100644
index 0000000..65e3af6
--- /dev/null
+++ b/Textures/beaten-down-brick/roughness.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:eec12138ed9fc315a02a6638bb1b8547de0eec295996c849930b31ba97733a7a
+size 4482702
diff --git a/Textures/night_2k.hdr b/Textures/night_2k.hdr
new file mode 100644
index 0000000..8702035
--- /dev/null
+++ b/Textures/night_2k.hdr
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:35b5ef6d664b9d32db5ef852f52f97b4227a0dca1830e9c8bdb3af5dc2f169cf
+size 7050455
diff --git a/Textures/space-cruiser/albedo.png b/Textures/space-cruiser/albedo.png
new file mode 100644
index 0000000..83fb643
--- /dev/null
+++ b/Textures/space-cruiser/albedo.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ec815efeb8281387ad70393c5923458a1cab95faa92bed8111e672cb588aad89
+size 4815677
diff --git a/Textures/space-cruiser/ao.png b/Textures/space-cruiser/ao.png
new file mode 100644
index 0000000..00bf854
--- /dev/null
+++ b/Textures/space-cruiser/ao.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:aeeb0a82f268cf9aa3203aa3f5dddbb392527deb3644f0d1ccd49c671ef14e14
+size 1687125
diff --git a/Textures/space-cruiser/metallic.png b/Textures/space-cruiser/metallic.png
new file mode 100644
index 0000000..b534e43
--- /dev/null
+++ b/Textures/space-cruiser/metallic.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:786534d1a23636b96f1ad256073107d71f75a43bb19e0897c121dba53e0babe4
+size 85878
diff --git a/Textures/space-cruiser/normal.png b/Textures/space-cruiser/normal.png
new file mode 100644
index 0000000..ad925c3
--- /dev/null
+++ b/Textures/space-cruiser/normal.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2d4bc47fb521824b193ac548b1dac7699bed4a9ce9cb530a2dd46169e2fd3e65
+size 4522050
diff --git a/Textures/space-cruiser/roughness.png b/Textures/space-cruiser/roughness.png
new file mode 100644
index 0000000..3024411
--- /dev/null
+++ b/Textures/space-cruiser/roughness.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:79ba1dc779726faa69aa74ed5a02bc90ea7a0fbce88ecb3c360316000d409c54
+size 3384003
diff --git a/Textures/space-cruiser/space-cruiser-panels2_height.png b/Textures/space-cruiser/space-cruiser-panels2_height.png
new file mode 100644
index 0000000..387b90d
--- /dev/null
+++ b/Textures/space-cruiser/space-cruiser-panels2_height.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c0909cd64df8bee6a50475af05a098c66e991f14be51eb7069350415d408e63e
+size 209655
diff --git a/src/Renderer/Renderer.cpp b/src/Renderer/Renderer.cpp
index 8ba5ff6..5f59e45 100644
--- a/src/Renderer/Renderer.cpp
+++ b/src/Renderer/Renderer.cpp
@@ -119,12 +119,45 @@ void renderCube() {
     glBindVertexArray(0);
 }
 
+unsigned int quadVAO = 0;
+unsigned int quadVBO;
+void renderQuad()
+{
+    if (quadVAO == 0)
+    {
+        float quadVertices[] = {
+            // positions        // texture Coords
+            -1.0f,  1.0f, 0.0f, 0.0f, 1.0f,
+            -1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
+             1.0f,  1.0f, 0.0f, 1.0f, 1.0f,
+             1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
+        };
+        // setup plane VAO
+        glGenVertexArrays(1, &quadVAO);
+        glGenBuffers(1, &quadVBO);
+        glBindVertexArray(quadVAO);
+        glBindBuffer(GL_ARRAY_BUFFER, quadVBO);
+        glBufferData(GL_ARRAY_BUFFER, sizeof(quadVertices), &quadVertices, GL_STATIC_DRAW);
+        glEnableVertexAttribArray(0);
+        glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)0);
+        glEnableVertexAttribArray(1);
+        glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)(3 * sizeof(float)));
+    }
+    glBindVertexArray(quadVAO);
+    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+    glBindVertexArray(0);
+}
 
+
+
+unsigned int brdfLUTTexture;
+unsigned int prefilterMap;
 unsigned int irradianceMap;
 unsigned int envCubemap;
 unsigned int envMapVAO;
 void Renderer::Setup()
 {
+    glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
     // Create ScreenVAO
     glGenVertexArrays(1, &ScreenVAO);
     glBindVertexArray(ScreenVAO);
@@ -158,11 +191,11 @@ void Renderer::Setup()
     shaders[static_cast<int>(RenderPass::PBR)].Load("../Shaders/pbr.vs", "../Shaders/pbr.fs");
 
 
-    albedo = TextureFromFile("../Textures/rusted_iron/albedo.png", ".");
-    normal = TextureFromFile("../Textures/rusted_iron/normal.png", ".");
-    metallic = TextureFromFile("../Textures/rusted_iron/metallic.png", ".");
-    roughness = TextureFromFile("../Textures/rusted_iron/roughness.png", ".");
-    ao = TextureFromFile("../Textures/rusted_iron/ao.png",".");
+    albedo = TextureFromFile("../Textures/space-cruiser/albedo.png", ".");
+    normal = TextureFromFile("../Textures/space-cruiser/normal.png", ".");
+    metallic = TextureFromFile("../Textures/space-cruiser/metallic.png", ".");
+    roughness = TextureFromFile("../Textures/space-cruiser/roughness.png", ".");
+    ao = TextureFromFile("../Textures/space-cruiser/ao.png",".");
 
 
     // Create the skybox from an HDR equirectangular environment map 
@@ -199,7 +232,7 @@ void Renderer::Setup()
     auto eqShader = Shader();
     eqShader.Load("../Shaders/HDRMap.vs", "../Shaders/HDRMap.fs");
 
-    auto hdrTexture = LoadIBL("../Textures/photostudio.hdr");
+    auto hdrTexture = LoadIBL("../Textures/night_2k.hdr");
 
     eqShader.use();
     eqShader.setInt("equirectangularMap", 0);
@@ -319,6 +352,71 @@ void Renderer::Setup()
 
     glBindVertexArray(0);
 
+    glGenTextures(1, &prefilterMap);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, prefilterMap);
+    for (unsigned int i = 0; i < 6; ++i) {
+        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB16F, 128, 128, 0, GL_RGB, GL_FLOAT, nullptr);
+    }
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
+
+    auto prefilterShader = Shader();
+    prefilterShader.Load("../Shaders/skybox2.vs", "../Shaders/prefilter.fs");
+    prefilterShader.setInt("environmentMap", 0);
+    prefilterShader.setMat4("projection", captureProjection);
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, envCubemap);
+
+    glBindFramebuffer(GL_FRAMEBUFFER, captureFBO);
+    unsigned int maxMipLevels = 5;
+    for (unsigned int mip = 0; mip < maxMipLevels; ++mip) {
+        unsigned int mipWidth = 128 * std::pow(0.5, mip);
+        unsigned int mipHeight = 128 * std::pow(0.5, mip);
+        glBindRenderbuffer(GL_RENDERBUFFER, captureRBO);
+        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, mipWidth, mipHeight);
+        glViewport(0, 0, mipWidth, mipHeight);
+
+        float roughness = (float)mip / (float)(maxMipLevels - 1);
+        prefilterShader.setFloat("roughness", roughness);
+        for (unsigned int i = 0; i < 6; ++i) {
+            prefilterShader.setMat4("view", captureViews[i]);
+            glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, prefilterMap, mip);
+            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+            renderCube();
+        }
+    }
+
+    glGenTextures(1, &brdfLUTTexture);
+    
+    // Pre-allocate enough memory for the LUT texture
+    glBindTexture(GL_TEXTURE_2D, brdfLUTTexture);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RG16F, 512, 512, 0, GL_RG, GL_FLOAT, 0);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    glBindFramebuffer(GL_FRAMEBUFFER, captureFBO);
+    glBindRenderbuffer(GL_RENDERBUFFER, captureRBO);
+    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, 512, 512);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, brdfLUTTexture, 0);
+
+    glViewport(0, 0, 512, 512);
+    auto brdfShader = Shader();
+    brdfShader.Load("../Shaders/BRDFIntegration.vs", "../Shaders/BRDFIntegration.fs");
+
+    brdfShader.use();
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    renderQuad();
+
+    glViewport(0, 0, 800, 600); // reset viewport
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
 
 }
 
@@ -540,6 +638,9 @@ void Renderer::Render(Scene& scene)
     shader.setInt("roughnessMap", 3);
     shader.setInt("aoMap", 4);
     shader.setInt("irradianceMap", 5);
+    shader.setInt("prefilterMap", 6);
+    shader.setInt("brdfLUT", 7);
+
 
     shader.setMat4("projection", projection);
     view = scene.MainCamera.GetViewMatrix();
@@ -564,6 +665,12 @@ void Renderer::Render(Scene& scene)
     glActiveTexture(GL_TEXTURE5);
     glBindTexture(GL_TEXTURE_CUBE_MAP, irradianceMap);
 
+    glActiveTexture(GL_TEXTURE6);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, prefilterMap);
+
+    glActiveTexture(GL_TEXTURE7);
+    glBindTexture(GL_TEXTURE_2D, brdfLUTTexture);
+
 
     // Render Spheres
     model = glm::mat4(1.0f);
@@ -626,16 +733,10 @@ void Renderer::Render(Scene& scene)
         entity.Draw(OutlineShader);
     }
 
-            glStencilFunc(GL_ALWAYS, 1, 0xFF);
-            glStencilMask(0xFF);
+    glStencilFunc(GL_ALWAYS, 1, 0xFF);
+    glStencilMask(0xFF);
                 
-        */
-
-     
-    
-   
-
-   
+    */
 
     
     // 4. draw result to screen