weekend essentials Feb. 18 to Feb. 21 ON EXHIBIT "Dis Illusion" is the School of Art & Design's latest exhibit. Delving into different realms of expression like holograms and digital manipulation, "Dis Illusion" explores the function of illusion and disillusion and how realities can be created and destroyed. "Dis Illusion" is on display until March 12 at the Work Gallery on 306 S. State Street, from noon to'7 p.m., Tuesday through Thursday. Free. CONCERT Chicago stalwart Tor- toise bring its minimal- ist, highly innovative post-rock to the Blind Pig Friday night in support of its new- est record, 2009's Beacons of Ancestor- ship. Twenty years in, Tortoise remains one of the few consis- tently engaging bands to bridge the ever- widening gap between Gen X-ers and college hipsters - but don't worry, your.parents still probably won't like them. Tickets $18, doors at 9 p.m. FILM How dedicated are you to winning your Oscar pool? Allow yourself to thoroughly experience the comprehensive. list of nominees by checking out the Oscar Nominated Short Films - both animated and live-action - open- ing Friday, playing through the weekend at the Michigan The- ater. There's a reason these films are given out annually at the awards show - they can be incredible, bite-size works of art. AT UMMA "Herb and Dorothy" tells the real-life story of Herb and Dorothy Vogel, a working- class couple with a love of modern art. The film details how they built an extraor- dinary modern art collection on a limited budget while befriend- ing the artists who produced the works. The film is showing Friday at 9:30 p.m. in UMMA's Helmut Stern auditorium. Free. ,