Question: Who employs a documentary-style, hand-held, cinéma vérité technique, blending naturalistic and photo-realistic computer-generated effects, Don Chaffey or Neill Blomkamp? 

Context articles: Alive in Joburg
Cinéma Vérité: Defining the Moment
Lonely Boy (film)
Neill Blomkamp
Wonderful Days (film)
District 9
Don Chaffey
Shaky camera
Jimmy and Judy
Cinéma vérité (disambiguation)

Alive in Joburg is a 2006 science fiction short film directed by Neill Blomkamp, produced by Simon Hansen, Sharlto Copley and Carlo Trulli as Executive Producer of Spy Films in Canada.
 It runs approximately six minutes long and was filmed in Johannesburg, South Africa with soundtrack featuring composer sound designer Drazen Bosnjak's "Harmonic Code".
 The film explores themes of apartheid and is noted for its visual effects as well as its documentary-style imagery.
 Blomkamp's 2009 feature film "District 9", starring Copley, expands themes and elements from this short film.
Cinéma Vérité: Defining the Moment is 1999 Canadian documentary film directed by Peter Wintonick about cinéma vérité filmmaking.
 The film looks at the work of such notable documentary filmmakers as Jean Rouch, Frederick Wiseman, and Barbara Kopple and Robert Drew, as well as the contributions of the National Film Board of Canada through such films as "Lonely Boy".
 The film also looks at the influence of cinéma vérité on the pioneering found footage horror film "The Blair Witch Project", and interviews video-auteur Floria Sigismondi.
 "Cinéma Vérité: Defining the Moment" was produced by the NFB.
Lonely Boy is a 1962 "cinéma vérité" documentary about the former teen sensation Paul Anka.
 The film takes its name from Anka's hit song, "Lonely Boy", which he performs to screaming fans in the film.
 This short documentary makes use of hand-held cameras to record intimate backstage moments.
Neill Blomkamp (] ; born 17 September 1979) is a South African film director, film producer, screenwriter, and animator.
 Blomkamp employs a documentary-style, hand-held, cinéma vérité technique, blending naturalistic and photo-realistic computer-generated effects.
 He is best known as the co-writer and director of the critically acclaimed and financially successful science fiction film "District 9", for which he was nominated for the Academy Award for Best Adapted Screenplay.
 He also directed the dystopian science fiction film "Elysium", which garnered moderately positive reviews and a good box office return.
 He is also known for his collaborations with South African actor Sharlto Copley.
 He is based in Vancouver, British Columbia.
Wonderful Days (also known as Sky Blue) is a South Korean animated science fiction film, released in 2003, written and directed by Kim Moon-saeng.
 It features backdrops rendered using photo-realistic computer-generated imagery, comparable to those in the film "", along with the use of highly detailed models for some of the backdrops into which the cel animated characters were then animated.
 However, convincing CGI animation of humans (especially human movement) was not attempted.
 The backgrounds in the film were shot with traditional motion control techniques, then processed to look like CG.
 The vehicles were all rendered, and the characters were cel animated.
District 9 is a 2009 science fiction film directed by Neill Blomkamp, written by Blomkamp and Terri Tatchell, and produced by Peter Jackson and Carolynne Cunningham.
 It is a co-production of New Zealand, the United States, and South Africa.
 The film stars Sharlto Copley, Jason Cope, and David James, and was adapted from Blomkamp's 2006 short film "Alive in Joburg".
Donald Chaffey (5 August 1917 – 13 November 1990) was a British film director, writer, producer, and art director.
Handheld camera, shaky cam, queasy cam, queasicam, hand-held camera or free camera is a cinematographic technique where stable-image techniques are purposely dispensed with.
 The camera is held in the hand, or given the appearance of being hand-held, and in many cases shots are limited to what one photographer could have accomplished with one camera.
 Shaky cam is often employed to give a film sequence an ad hoc, electronic news-gathering, or documentary film feel.
 It suggests unprepared, unrehearsed filming of reality, and can provide a sense of dynamics, immersion, instability or nervousness.
 The technique can be used to give a pseudo-documentary or "cinéma vérité" appearance to a film.
Jimmy and Judy is an 2006 independent film starring Rachael Bella as Judy and Edward Furlong as Jimmy.
 It is written and directed by Randall K. Rubin and Jon Schroder.
 The film was shot on hand-held video in the Cinéma vérité style.
Cinéma vérité is a documentary film-making style combining naturalistic techniques with stylized cinematic devices.