Ω This is just a small complimentary note for the RBD solver video that is here To feel comfortable watching the video you should: Be familiar with basics vector and matrix operations. Have basic physics knowledge Have heard about differential equations Have heard a bit about finite differences methods (last two will more like just help you understand some calculations, but not required to understand the point) please, check 101 below the video, maybe it will be of any help. https://vimeo.com/243886050 From description of the video: I thought to try to contribute to the community with a little tutorial. Everyone seem to know everything about fluid solvers these days, so i decided to cover basics for a bit more obscure, at least for Houdini users, topic. This is part one of possible 3 parts. I tried to push everything into one video, but just got too tired. so let's see how this one goes and if this topic together with this kind of presenting of the m