pre double pipeline commit. The following will attempt to add another rendering stage for textured cuboids.

shaders/cube.vert

@@ -0,0 +1,27 @@
+#version 450
+
+layout(binding = 0) uniform UniformBufferObject {
+    mat4 model;
+    mat4 geom_rot;
+    mat4 view;
+    mat4 proj;
+    bool[16] use_geom_shader;
+} ubo;
+
+
+layout(location = 0) in vec3 inPosition;
+layout(location = 1) in vec3 inColor;
+layout(location = 2) in vec2 inTexCoord;
+
+layout(location = 0) out vec3 geoColor;
+layout(location = 1) out vec2 geoTexCoord;
+
+void main() {
+    if (ubo.use_geom_shader[0]) {
+        gl_Position = ubo.geom_rot * ubo.model *  vec4(inPosition, 1.0);
+    } else {
+        gl_Position = ubo.proj * ubo.view * ubo.geom_rot * ubo.model *  vec4(inPosition, 1.0);
+    }
+    geoColor = inColor;
+    geoTexCoord = inTexCoord;
+}