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Hi all, I'm new to the forums and have been learning Houdini for the last 1-2 months. I've totally fallen in love with Houdini's procedural workflow and was surprised how intuitive and logical it feels contradicting my beliefs :-) Anyways been trying to make a smoke sim of a cannon fire. Only the smoke, no burst of fire (ill add that in comp). Problem I'm facing is directing the smoke the way I want. Tried making the inside of the barrel a volume and pushing it out with forces and a RBD sphere. This way its hard to get the timing right, smokes too slow and it gives a ugly mushroom shape. Looking at this clip: https://www.youtube.com/watch?v=5bYRc0nm8WQ&t=1m5s the smoke fills the front of the cannon instantly, making me think I should combine two sims; one that's the shape of the the large diffuse smoke, and one more billowy blown out of the cannon. Then write to disk and time-warp and offset as needed. So questions are as follows: Could I model the initial shape of the big diffuse smoke as poly in front of the cannon, make it a volume and simulate it to blow away (no emmision)? What is the best way to add velocity to the thicker smoke coming out the barrel? forces? Anyone done something similar have any tips for making this effect? How to avoid the infamous mushroom shape? I'll see how far i get with the "two-sim" solution tomorrow and post my findings. All the best, Ola PS: I'm aiming for a less dramatic effect than the one in the video. Less smoke, but still realistic.
