Would this help mouse control class DrawBoxPointDJ def onLButtonDown( flag,x, y,dj_view ) Sketchup.active_model.start_operation "onLButtonDown",true,true,true dj_xdown = x;dj_ydown = y;dj_view="drawBoxPoint_dj";dj_point=(Sketchup.active_model.active_view.inputpoint x,y).position puts dj_point . . . . end end Also BMVBv1-Script by T. Marek Sections: Animation - Camera ; Materials - Rendering Draws a face that covers precisely current view. Created face can be used for B&W image with alpha transparency taken from the same camera possition. Face can be semitransparent and have some openings.