9/11/2023 0 Comments Action movie fx helicopter crash![]() ![]() We referenced what would happen to the trees, the buildings and the water, and then tried to recreate something similar that would fit into the shots for the sequence.ī&a: Can you break down the different elements of that explosion and shockwave-including what city assets, water, debris and other elements-and how the explosion was simulated? What would you say was the way you ensured you had the right balance of all these things?Īleks Pejic: The explosion and shockwave were created in Houdini with lots of different passes to determine the different types of debris, building destruction, the water simulation, spray and waves, and the dust from the ground. The final look was really the overwhelming dust that is created by these big explosions.įor the rest of the shockwave sequence, we looked at real life references of tornadoes and hurricanes that reach up to 150 mph. ![]() So, building the destruction became almost secondary to compliment the look, rather than driving it. From our references, we learned that these kinds of explosions generate a lot of dust, and visually that dust overtakes everything else that’s underneath it. In the end, we took some of those real life references and, with direction from Peter and Louis, created the final explosion which was a hybrid of both.Īs for the destruction around the explosion, we actually expected to do significantly more damage than we did in the end. So, there were a fair amount of creative challenges to find the right look. We would either end up with only water or, if it was an earth explosion, just the debris and the soil without the water. We quite quickly realised that neither reference on its own would work for the scale and look we needed for the particular shot. Bus effects.ī&a: For the shots of the final explosion and shockwave, what tests did you do at first to get the desired look?Īleks Pejic: We started by referencing both nuclear and underwater explosions throughout history. So, we enhanced what was there in the plates, adding CG elements to make it more true to life. ![]() The bus was shot practically, but it was made out of polyester and that was fairly visible in the sense of its colour, and the way the damage and debris behaved. We used a combination of all the available tools for environment builds to get the sequences looking as photoreal as possible.ī&a: There’s a shot where it breaks a bus apart in two-can you discuss what was done here in live-action and how you got to a final VFX shot?Īleks Pejic: Again, for this sequence, the bomb prop was replaced with a fully CG asset and we enhanced it with the roll damage, dust, and debris to make it more believable. Peter also did very specific helicopter passes for us in order to gather the references needed to reconstruct particular areas and sections of Rome for the big wide establishers. Our DFX supervisor, Ben Cowell-Thomas, was on set in Rome with Peter and they made sure every location was LiDAR’d and photographed. Sometimes we used ariel plate photography to reconstruct the geometry and sometimes we created buildings in full CG, depending on the camera moves and how close the shot was to those buildings. © 2023 Universal Pictures.Ĭreating the environments varied from shot to shot. We combined together the two shoot locations to create the Rome environments, either by altering the Turin plates and adding Roman features, or by enhancing the Rome plates. So, the final look is not necessarily true to life. The original asset would look one way in the lighting conditions, and then completely different with all the charcoal, burnt sections, and scratches.ī&a: How were sections of streets for Rome (or the filming location) built up, either for CG shots, or extensions, or to aid in compositing? How were these assets incorporated into DNEG’s pipeline?Īleks Pejic: The Rome sequences were shot in different locations–some in Rome and some in Turin–and, as the story had a particular pace, some of the locations had to be compressed distance-wise. ![]() That triggered the creation of several different bomb variations and different looks. All of this would create damage to the surface of the bomb, which Peter wanted to demonstrate as we progressed through the sequence. But then also from the gas pump explosion when it catches fire. To start with, damage from going through buildings and colliding with roads, etc. What we learned as we got into the sequence was that, because the ball was rolling down the hill for quite a long time, it was going to go through certain phases of damage. ![]()
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