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## Pixar in a Box

### Course: Pixar in a Box>Unit 7

Lesson 1: Introduction to particle systems

# Create water surface using particles

How do we draw a surface of water using only particles? Particles act like tiny heaters to create smooth surfaces in animations. By connecting points with the same temperature, we form curves or surfaces that resemble water or other liquids. This technique helps simulate realistic water, paint, and other fluid effects in movies like Finding Nemo and Monsters University.

## Want to join the conversation?

• What is the method of treating each particle like a heat source to create a more realistic water simulation called?
• Sometimes, graphics programs call them 'meta-balls'. But you can impress your friends by calling them 'iso-potential surfaces', which is the long version of 'isosurfaces' mentioned above.
• how did you make the program?
• How do I move from simply viewing the videos to trying out the simulations?
• I made some basic Metaballs, you can see them in this program:
But, I was wondering if there was a more efficient way of generating Metaballs other than just going through each "cell" and seeing if its inside one.
• Is there a program on Khan Academy that I can use to do the math of generating contour lines?
• I guess it's an algorithm who calculates contour lines which is programmed with a mathematical formula?
• how is it possible to make paint look real
• It is the same way you make water look real, you just need to set the viscosity higher and probably adjust some other formulas. Of course, the artwork is different since the colors, the reflections of the light, and other visual clues are completely different. The point is, with paint you also use particles to simulate movement.