Complex sentence: Still unsatisfied with the overall effect, Merhige decided to use an optical printer but was unable to find one within the film's budget, so he constructed one himself using old and spare parts that he acquired from camera stores and special effects houses.
Split into simpler sentences: Still unsatisfied with the overall effect, Merhige decided to use an optical printer but was unable to find one within the film's budget. Merhige then constructed one himself using old, spare parts that he acquired from camera stores and special effects houses.