“Observe,” Omola Studio’s second installment of APRiL (Artists Prospering Really is Limitless), features works by De, Kulimushi Barongozi, Kaelynne Hernandez, Miguel Mendoza, and Rex Morris. The first iteration happened last spring, on a ground-floor space in 91 Shelton in Newhallville. This one happened in the same building, five floors up, for Saturday and Sunday, April 20 and April 21.