The post-production of 3D MAXTRAC was not very difficult. The most challenging part is that we had to shoot everything under terrible weather on a mountain. It was rainy and windy. The whole shoot was from 5 am till 1 am the next morning. On top of that, many crew members were the first time at a shoot so you also needed to pay extra attention to them so the whole shoot. can go smoothly. After all, we were racing with sunlight.