What is PixelPhysics?

PixelPhysics will be an interactive learning platform built around one core belief: physics simulations should be accessible to anyone willing to put in the work—not just researchers with a PhD in computational mathematics.

If you've ever tried to learn fluid dynamics or particle physics on your own, you've probably run into the same wall: dense academic papers, cryptic notation, and zero practical guidance on how to actually turn those equations into running code.

I built this platform to bridge that gap. I take advanced, state-of-the-art simulation algorithms—from standard SPH to implicit pressure solvers like IISPH and DFSPH—and break them down into intuitive, visual, step-by-step explanations. No hand-waving, no skipped steps. Every single concept is built from first principles and translated into readable code you can actually run, tweak, and integrate into your own projects.

My Vision

I started this platform with particle-based fluids, but my roadmap expands across the entire spectrum of computer graphics and physical animation. I am developing PixelPhysics into a complete, step-by-step curriculum covering:

  • Particle-based fluid simulation (SPH, PCISPH, IISPH, DFSPH, PBF)
  • Grid-based fluid methods
  • Cloth & soft-body dynamics
  • Rigid body simulation & collision detection
  • Position Based Dynamics & XPBD
  • ...and way more is planned

The process of getting into physics simulations is incredibly hard — and can be deeply frustrating when you don't already know the math. I've been through that myself. My goal is to build the resource I wish I had when I started: a single place where anyone — hobbyist, student, or professional — can go from zero to building quality physics simulations without hitting that wall.


About the Founder

Marcel Kießlich

PixelPhysics is founded by Marcel Kießlich, who holds an MSc in Game & Simulation Engineering from the University of Applied Sciences in Salzburg, Austria, where he completed his theses on Position Based Fluids and real-time VR smoke rendering. Leveraging this technical background, he has built a growing YouTube audience and published multiple books on physics simulation, establishing a proven track record of translating complex mathematical models into running code. He leads the development of PixelPhysics as a venture dedicated to making advanced physical animation accessible to developers worldwide.