Fluids - Pyro & Smoke

Recommended Readings

Items	Links
Documentation	Pyrosolver Pyrosolver sparse
Industry / Case-studies	Tokeru - Smoke & Pyro Pyro Tips & Tricks // Jeff Wagner // Illume Webinar
Books	Fluid Simulation for Computer Graphics, Second Edition
Papers	Fluid Simulation for Computer Animation //Robert Bridson & Matthias Müller-Fischer SIGGRAPH 2007 Course notes

Approach

1. Advect particles or points (Garbage in garbage out; interesting source interesting output)

2. Convert to VDB (stores values where there is one hence faster and cost-effective)

3. Add DOP > Add smokeobject + pyrosolver

4. Add disturbance or details with microsolvers (Gas dissipate, disturbance, turbulence)

5. Optimize simulation calculation withgasresizefluiddynamic

6. Caching simulation

7. Texturing & Rendering

Syllabus

• Kinesthetic learning

  • Do R&D on different settings and render them out

Shadow not showing in viewport (not solved)

• Viewport preferences > Under the Effects tab make sure HDR rendering is enabled.

• Under the Geometry tab of the Display dialog there is also a Volume Quality drop down.

• Smoke density in smoke

From Applied Houdini volumes II

Good practice

• Division sizes: 150 (sketch), 300 (detailed), 600 (HQ)

  • Use Takes to easily toggle values

• Use size of container/division size to get the optimal value for voxel size

• Use OpenCL to speed up rendering if you have a good graphics

• Override divisions to about 50 for visualizing guides

Notes

• Temperature is creating velocity

  • Visualize velocity

• Gas resize fluid dynamic - have a threshold to cut down on size of bounding box

  • Tracking object - use original

• MICROSOLVER

  • gasdissipate

  • gasdisturb

    • Take edges and perturb them

    • prevents mushroom smokes when you disturb the vel

    • control settings - vel

• Rest field

• PRESSURE

Applied Houdini Dynamics III

• Alternate cloud volume

  • cloud

  • cloudnoise