After rendering an image I select “Compositing” from the screen layout drop-down and sometimes I cannot add compositing nodes and/or view the render result as the backdrop.
When I try to add the output node everything is grayed out in the add node menus.
I have been able to correct this by clicking wildly out of frustation, but that of course prevents me from seeing exactly what I did to get it working.
Okay - I kept track of my mindless clicking this time and discovered that the nodes would only appear once I clicked off the Node-Tree-Type-Compositing to either Node-Tree-Type-Texture or -Shader and then back to the -Compositing type.
However the render result still does not want to appear as the backdrop in the compositor view.
