I found that on a Macbook Pro with Retina screen running both Debian and Ubuntu, Skyscraper doesn't scale up the render window when the scaling factor is greater than 100%, making it unusable. Setting the scaling factor to 100% causes it to work fine.
I found that on a Macbook Pro with Retina screen running both Debian and Ubuntu, Skyscraper doesn't scale up the render window when the scaling factor is greater than 100%, making it unusable. Setting the scaling factor to 100% causes it to work fine.