Now click the Presets, and select the Grass preset from the Particles
Notice when you select a new setting, different from the current one,
that some of the parameters in the Particles panel will change.
Particles are controlled by a number of these parameters, such as
gravity, lifespan, splits and color gradient, to name just a few.
There are also several 'Styles' of particles: Lines, Lines with Alpha,
Brush, Shrinking Lines...
Shrinking lines start wide and shrink to thin. You can set the initial
width with the Size slider.
||Notice that Grass uses the
Shrinking Lines Style, with a fairly high value for the Size (for thick
Reduce the Size value close to the minimum or change the style to
||Now just drag the mouse
with the left mouse button down from left to right across the sky. PD
Particles will generate particles that look like thick tufts of grass.
You can dabble a little left and right for some variations.
Notice how the grass shoots in all directions: it grows out of the
The grass which grows downward appears shaded dark. That's because the
'Shaded' checkbox is enabled. If you uncheck it, then the particles
retain their color no matter which way they grow.
||Next, draw a few more dabs
of grass lower and 'in front' of the first round.
||You can repeat this and
gradually increase the 'Size' value in order to make the grass appear
Other parameters to try are the Lifespan, the number of
particles, and 'Use mouse velocity'.
||Using the mouse velocity
means that the speed at which the particles shoot out and grow to their
final length varies with the speed at which you move the mouse.
If you yank the mouse out of the wrist with a sudden jerking motion,
you'll get some big tufts of grass to grow tall.
||Now we might want to
sprinkle a few flowers across the bed of grass. One way to get this
accomplished is with the Organic effects brush named 'Flowery'.
are several flower images available, as well as leaves and others.
Select them from the Brush Images in the 'Window' menu, which
shows the internal Brush. set.
||Choose the desired color.
You may find that the flowers are small when drawing slowly, but get
larger when painting in faster brush strokes.
Indeed this is an example of a brush has a parameter set to change the
size of the brush image with the speed at which it moves.
The size can be made to increase with the speed, or decrease with it.
For example, a drippy pen would grow larger when slowing down, as the
ink infiltrates the paper when slowing down.
The flowery brush does the opposite: painting in fast strokes deposits
||Click the Brush settings
In addition to the 'Scale by Speed' value, you may also notice some
Random position for a more natural distribution of the flowers
Random size to make sure they don't appear all at the same size
Random hue, saturation and value helps in slightly changing the color
and brightness, again to make sure that the flowers don't all appear as
copy-cats of eachother. This can give a more natural appearance.
||Apply a few more flowers,
perhaps with a different base color.
In the next segment we'll focus on adding some storm clouds.
Note that there are many tutorials on this subject in the Project
Dogwaffle tutorials section,
some of which you can use as inspiration for techniques to try with PD