SpeedSix.Snow (Discreet Box4)
PURPOSE
Snow simulation using particles.
Snow is a time based effect; the characteristics a particle is born with will evolve over time (every frame generated) to create the effect.
INPUT CLIPS
1: Background Clip
2: Settle Clip
: The snow can settle on non black areas within this clip. However you do need to have a static shot for this to suceed.
Snow CONTROL PAGE
Restart Snowstorm (Pushbutton)
Restarts the snow sequence using the current settings. This control will be found on several pages to help you quickly see the results of any changes to the birth properties of each snow flake.
Restart+PreRoll (Pushbutton)
Restarts and pre-rolls the snow for the current value of PreRoll
Do PreRoll (Pushbutton)
To see further into the evolution of the particles, do another preroll.
PreRoll (Number Min: 1, Max: 1000, Default: 150)
Run the particle system for the specified number of pre-roll frames before generating the first frame of the output clip.
Advance (Pushbutton)
Click to advance the snow one frame without changing frames or other settings. Useful for checking frame by frame evolution and motion speeds.
Left (Position Default: 0.2,0.8)
Right (Position Default: 0.8,0.8)
Position Var (Number Min: 0.0, Max: 2.0, Default: 0.02)
The region within which snow particles will be created.
Lifetime (Number Min: 1.0, Max: 1000.0, Default: 200.0)
How long each snow particle drop will live for.
Density (Number Min: 0.0, Max: 10000.0, Default: 20.0)
How many smoke particles will be created each frame.
Initial Velocity (Number Min: -20.0, Max: 20.0, Default: -3.0)
The initial speed of a snow particle. The direction is always in the direction of gravity.
Velocity Var (Number Min: 0.0, Max: 100.0, Default: 50.0)
Size of random variations in initial speed of a snow particle. The direction is always in the direction of gravity.
Snow Settle (Checkbox Default: Off)
Allows the snow to settle on non-black areas of the settle clip.
Probability (Number Min: 0.0, Max: 100.0, Default: 50.0)
How likely it is that the snow will settle.
Bias (Checkbox Default: Off)
Turn on the bias to wet or dry snow feature.
Dry Snow (List Box Options: Wet | Dry, Default: Wet)
Select the type of snow your prefer.
On: smaller flakes will fall more quickly.
Off: Larger flakes will fall more quickly.
Size Bias (Number Min: 1.0, Max: 20.0, Default: 1.0)
The speed the snowflakes can fall at varies with size. At 0.0 there is no bias. As the value increases the larger flakes will fall faster than the smaller flakes. But if Dry Snow is On, then the small flakes fall faster than the larger flakes.
Demos (List Box Options: Blizzard | Base | Fine | Heavy | Avoid | Divert | Glitter | Pink | Vomit | Amorphous | Pastel | Stream, Default: Blizzard)
Select a preset to get you going.
Forces CONTROL PAGE
Restart Snowstorm (Pushbutton)
Restart+PreRoll (Pushbutton)
Do PreRoll (Pushbutton)
See start descriptions.
Turbulence (Checkbox Default: On)
Turn on the turbulence feature.
SwirlDens (Number Min: 0.0, Max: 100.0, Default: 60.0)
How many bumps there are in the atmosphere from one edge of the frame to the other. The snow swirls as it runs into these bumps.
SwirlAmp (Number Min: 0.0, Max: 100.0, Default: 1.0)
How powerful the bumps in the atmosphere are.
SwlMaxTim (Number Min: 0.0, Max: 100.0, Default: 0.0)
Frames over which the swirl amplitude builds up to its maximum value (set by SwirlAmp).
Friction (Checkbox Default: On)
Turn on the friction feature.
Friction (Number Min: 0.0, Max: 1.0, Default: 0.05)
Controls the frictional force of the atmosphere on the snow as a percentage of the snow velocity lost per frame. Slows the snow down.
Gravity (Checkbox Default: On)
Turn on the gravity feature.
Gravity (Number Min: 0.0, Max: 10.0, Default: 0.2)
Scales the strength of the gravitational force.
Grav Angle (Number Min: 0.0, Max: 359.0, Default: 270.0)
Controls the angle at which gravity acts, measured in degrees clockwise from due East. The default [270.0] is towards the bottom of the image.
Multi Directional (Checkbox Default: Off)
Wind (Position Default: 0.2,0.4)
Wind Target (Position Default: 0.8,0.4)
Wind Spread (Number Min: 0.0, Max: 180.0, Default: 10.0)
Wind Speed (Number Min: 0.0, Max: 180.0, Default: 5.0)
The wind when active, and not Multi-directional, blows from the Source to the Target within a cone defined by the WindSpread with the strength of the WindSpeed. Turn on Multi-Directional and the wind will blow equally in all directions.
Wind (Checkbox Default: Off)
Turn on the wind feature.
Look CONTROL PAGE
Restart Snowstorm (Pushbutton)
Restart+PreRoll (Pushbutton)
Do PreRoll (Pushbutton)
See start descriptions.
ColourVar (Number Min: 0.0, Max: 100.0, Default: 0.0)
Random variation in the colour of the snow particles.
MonoVar (Number Min: 0.0, Max: 100.0, Default: 0.0)
Random variation in the brightness / density of the snow particles.
Snow Colour (Colour Box Default: white)
Bases snow colour.
FadeMode (List Box Options: Col+Dens | Colour | Density, Default: Density)
This control affects how the snow particles composite with one another and with the background image and has a great effect on the final appearance.
Look (List Box Options: Point | Streak | Flake | Star, Default: Flake)
How the snow particles are drawn.
Size (Number Min: 1.0, Max: 20.0, Default: 4.0)
When in Flake mode this is the maximum size a snow flake can be.
Size Var (Number Min: 0.0, Max: 100.0, Default: 100.0)
How varied the flake sizes are. At 0.0 they will all be of a similar size.
Glints CONTROL PAGE
Glints (Checkbox Default: Off)
Turn on the glint feature.
Glint Target (Position Default: 0.1,0.5)
Glint (Position Default: 0.9,0.5)
Glint Prob (Number Min: 0.0, Max: 100.0, Default: 50.0)
Glint Zone (Number Min: 0.0, Max: 180.0, Default: 90.0)
Glint Tight (Number Min: 0.0, Max: 1000.0, Default: 30.0)
Glint Colour (Colour Box Default: white)
With the glint feature on, the snow can catch the light as it passes through the region defined by the glint parameters.
Colour (List Box Options: Box Colour | Snow Colour | Random Colour, Default: Box Colour)
The choice of the colour source for the glints.
Box Colour: User selected single colour.
Snow Colour: The colour is taken from the snowflake.
Random Colour: A randomly chosen colour.