Sandbox

Press f to fullscreen
Press p to pause
Press m to move one frame
Press e to geyser
press r to waterfall
Particles
Grid
Compensate Drift
Separate Particles

Floor

PIC
FLIP
threshold

Gravity

Background RGB
RED
GREEN
BLUE

Low density particle RGB
R-low
G-low
B-low

high density particle RGB
R-high
G-high
B-high

Inspiration and starting point credit due to
Matthias Müller’s Ten Minute Physics Youtube Channel