The bullet effects in Terminator 2 were not created using CGI, but rather through practical effects developed by Stan Winston and his team. They researched the correct look for the splash impacts by firing projectiles into mud and then cast the resulting shapes in foam rubber with a chromed finish. The foam rubber splash patterns were deployed using a simple mechanical system, creating a realistic effect. This technique allowed for a convincing portrayal of the T-1000's liquid metal body reacting to bullets.