Is there a way render patterns to sample?

Just a quick one so I can save time instead of rendering out as a .wav and importing it back in

If you mean bouncing/resampling then yes

Highlight and render to sample
http://tutorials.renoise.com/wiki/Render_%26_Resample_Parts_of_the_Song

And remember you can select the master track when rendering to sample. The only caveat is that it won’t render any master channel effects (this is so master channel effects don’t get applied twice if you play the sample back)