Hey, author here. Construct Classic is actually open source - the renderer code is here: http://construct.svn.sourceforge.net/viewvc/construct/Common/CDisplay.c

Hey, author here. Construct Classic is actually open source - the renderer code is here: http://construct.svn.sourceforge.net/viewvc/construct/Common/CDisplay.cpp?revision=172&view=markup http://construct.svn.sourceforge.net/viewvc/construct/Common... I don't think we did anything really dumb - but it was quite a long time ago now! We did still spend a fair amount of time optimising it. I still think its amazing the two could be so close, when personally I think both are reasonably well written. At the time Classic beat a bunch of our old competitors on performance, too.