Santa Monica-based previsualization company Halon Entertainment has set plans to expand to Vancouver and London.Company will add two full-time previs teams in Vancouver and two in London. Each team is five to 12 people, depending on the size of the project. The Vancouver office will open in the spring. Halon will also partner with concept and story art company Ninth Ray Studios, whose owner/founder is based out of Victoria, B.C. Halon’s credits include “Life of Pi,” “Avatar,” “The Huger Games” and the upcoming “Star Trek Into Darkness” and “World War Z.” “International expansion is sort of a necessity,” Halon owner and previs director Daniel Gregoire told Variety, noting Halon’s clients often do pre-production in Los Angeles but shoot and do post in regions with strong tax incentives, especially Vancouver and London. Gregoire said the opening of Halon’s Vancouver office will coincide with the start of shooting on a major tentpole, which he declined to name, on which Halon is already working. Vancouver’s mayor and Economic Development Commission have been actively trying to lure more tentpole pic production to the city, which has lost out as shooting migrated to Toronto and Montreal in search of stronger tax incentives.