We got a skybox

destrum/assets_src/shaders/fullscreen_triangle.vert

@@ -0,0 +1,10 @@
+#version 460
+
+layout (location = 0) out vec2 outUV;
+
+void main()
+{
+    outUV = vec2((gl_VertexIndex << 1) & 2, gl_VertexIndex & 2);
+//    gl_Position = vec4(outUV * 2.0f + -1.0f, 0.0f, 1.0f);
+    gl_Position = vec4(outUV * 2.0 - 1.0, 1.0, 1.0);
+}