Hi,
1. What Noise limit would be best for a final render (Mainly used in architectural renders shown on screens)
- Around 2-3% is usually fine, but it can sometimes differ depending on the exact scene. It may be a good idea to try rendering one frame without any limit, then observe what is the noise level when it looks "good enough" to you, and then continue using this value as the noise limit. Btw, is this really an "architectural render"? :D
2. I have been using 2.0 sharping, is there typically a better amount to use?
- There is no better or worse value here. Use the value that you like, or save to CXR and then do post production in the Corona Image Editor. :)
3. I have been rendering at 3000x1688. This seams to be rendering quickly for me (Renders taking 20mins to an hour in some cases) This there a better size people would recommend.
- The size depends on the use case. Are you planning to print it, show it on the web, upload to facebook...?
I am trying to get a cleaner and sharper image that will improve my workflow!
- The longer time is spent on the rendering, the cleaner (meaning: noise-less) your image is. "Sharper" could mean many different things, but you can try using different image filters in Render Setup > System. For example, "Tent" filter will give you a generally sharper image than the "High quality" filter (however with Tent it will render a bit slower).