Depence² offers high quality image rendering in up to 8K* resolution. To render your current Scene as an image navigate to the Main menu > Rendering > Render Image...
With the Width & Height settings you can define the target resolution of your image, which can be also selected from the Presets list. The dialog also gives Quick-Access to the current Render Settings.
The Multisampling is the most performance/quality relating option. It defines how often each pixel will be computed to render high quality anti-aliasing and detailed light beams. Please note that a Multisample factor of 8x might also multiply the time to render by 8.