title: Is it possible to create a cubemap renderbuffer?
body: <p>I have a FBO whose color attachment is a cubemap texture - this is needed because I need to render my scene to a cubemap.</p>
  <p>However, I also need a depth attachment to render it properly. I wanted to use a renderbuffer instead of a texture since I will not be sampling it directly.</p>
  <p>Is it possible to create a &quot;cubemap&quot; renderbuffer or I really need to create another texture? Using a normal renderbuffer doesn't work, since the framebuffer fails to be created with <code>GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS</code> error.</p>