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Here's a neat little trick
when painting with particles: if at any time you wish to stop the
emission of new particles.....
Press
& hold SHIFT to finish the current particles to their
completion. No new particles appear.
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Those particles which have already been started will continue until
they reach the end of their lifespan. But no new particles will be
emitted.
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This is very useful when
you're drawing long grass and there is sudden color changes at the end
of the particles when new particles take over. Especially if the end of
the trails is very transparent (low opacity in the gradient) and the
start of the new particles is very opaque, even perhaps using shrinking
lines as the Style.
You don't want the beginning of a new grass tufts that dangles at the
end of the prior ones, like it shows in this example. The gradient goes
from dark blue to light blue, white grey and black, using shrinking
lines and reduction of opacity.
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top brush stroke: new particles appearing in part
bottom example: no new particles, the last ones are finished to
completion, that's it.
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Using SHIFT, you can tell
Project Dogwaffle's particles to finish painting the current particles
to the end of their Lifespan, but not to paint new ones.
In this example, drawing from left to right, the top brush stroke
didn't use SHIFT. It can in some cases be useful for finishing the tip
of a branch with a bud. Or to make it look like it's been broken off.
In general you'll want to get a clean ending though, like in this case,
where we pressed SHIFT near the end of the brush stroke and waited
until the existing particle trails finished cleany.
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