Author: Manuel

Analytical Foam

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As position based simulation techniques are very fast theses days, it is possible to use them to confrom intersecting spheres to each other, to model foam. Nevertheless there are other possibilities, too.

Polyfolding – Part 1

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This is the first part of a two part tutorial. Part two will be available soon. Polyfolding is an interesting effect where you split up an object to individual bands and make them curl up. It can be used to disintegrate an object or make it appear from nothing. To achieve the curling behaviour some matrix math is needed. All primitives are treated like individual objects, with their own distinct transfomation matrix attached. Then, they […]

Implementing A Position Based Cloth Solver From Scratch

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Position Based Dynamic effects are quite popular today as these provide us with fast, predictable and stable simulations. Houdini comes with PBDs packaged inside of the “Grains” node and with H17 with XPBD inside of the vellum solver. This video shows how to implement one of the ancestors of the PBD technique. The idea comes from an aritcle on gamasutra called Advanced Character Physics By implementing this Verlet based cloth solver we gain quite some […]

Create and Simulate a Procedural Rope

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Today we’ll create a procedural rope and simulate it using the grain solver. There are always many different ways to achieve stuff in Houdini. In this tutorial I chose the VEX route to generate the rope. This gives a nice self-contained node that can easily be turned into a digital asset. The procedural rope is then deformed to a simulated wire using wire deform. Download end file

Crochet – Blending between Delaunay and Voronoi

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Here at Entagma we love to deal with yarns. This video extends the “yarn-effects” with a crochet approach. Using the delaunay triangulation of an input mesh and its dual diagram, the voronoi mesh, we build a procedural model that uses point color to blend smoothly between the two. That gives an intricate pattern, especially in the blending regions. As a bonus we animate the effect. Download end file

Nerd Rant: Render Engines

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Nerd Rant

There are many render engines out there nowadays and it’s not easy to choose the right one. CPU or GPU, biased or unbiased. In this video we discuss the pros and cons of different render engines from our humble point of view. As a bonus we talk about LUTs and view transforms.

Nerd Rant: Hardware – DIY vs. Pre Built

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Nerd Rant

This is an experimental post. As we often sit down to discuss different topics from our Entagma life, this time we just switched the camera on and created a vlog-type movie for you. Just the right thing to watch on a otherwise boring “no-new-tutorial Monday”. After Mo’s post about building his own workstation we started to discuss further what the best strategy is to acquire a machine for GPU rendering. Buying off-the-shelf hardware has advantages, […]

Low Poly Transform

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Blending smoothly between a high-poly mesh and its low-poly representation is a subtle but useful effect. In this tutorial you’ll learn how to create two versions of the same object, one smooth and one facetted, with the exact same topology. This enables you to blend between the two using a falloff value.