first commit

assets/shaders/background_fragment.glsl

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+#version 330 core
+out vec4 FragColor;
+in vec3 WorldPos;
+
+uniform samplerCube environmentMap;
+
+void main()
+{
+	vec3 envColor = texture(environmentMap, WorldPos).rgb;
+    
+    // HDR tonemap and gamma correct
+    envColor = envColor / (envColor + vec3(1.0));
+    envColor = pow(envColor, vec3(1.0/2.2)); 
+    
+    FragColor = vec4(envColor, 1.0);
+}