This has happened twice now while working on my Blending Life project – after a successful render, I change a few layer specs, hit f12 again, and nothing but black is rendered, well actually it’s the ambient RGB, but you get my drift. It’s as if the models have suddenly become invisible. Digging into the material specs, Blender reports that every one of the texture maps used for every material cannot be found – “Can not get an image.” Furthermore, neither hitting Reload nor actually re-establishing the link through the image-load icon fixes the problem. The materials are rendered useless (pardon the pun).
Now, so far, just quitting and re-opening the file has been a fix, but that sometimes means losing hours put into rendering out individual Render Layers for the Compositor to chew on – they can’t be saved and need to be re-rendered.
So, is this a known issue, and is there some magic to kicking Blender in the butt so it will rememebr where the images are without having to shut down?