renderresult as scene

This is probably a really obvious question, but google didn’t give me any results that helped. I would like to use the render result from one scene to be a texture in another scene. I know I could render it as a file output and use that as a texture, but the renderfarm doesn’t support that.

any help would be appreciated, many thanks ~ Istvan.

Ok, I guess it isn’t that obvious a question. How might I go about this?