dynamic paint

The new version says cache is disabled until file is saved. Whats it talking about ? I have no file yet! The paint outputs are red. Can’t change that. Waves show up in render. paint shows up in 3d view but not in render. What do I need to do to render paint?
Thank you

The paint needs to be sent to a texture and then the texture applied to the objects material, just like a normal texture
See http://blenderlabrat.blogspot.com/2011/08/gsoc-dynamic-paint.html

Thank you Richard