For the finale of Orgelfest16, the Friends of the Kotzschmar Organ presented Ray Cornils, Portland’s municipal organist since 1990 and essentially the public face of the Kotzschmar organ. Cornils has long been one of the biggest draws on the Friends series; only its organ-with-film concerts draw notably bigger crowds. Cornils’ recent announcement that he would retire at the end of 2017 may have lured more people to Merrill Auditorium for his Tuesday evening recital as well.