VFX "stock effects"

[johnnyquest]

• rolling debris
• sparks (w/ properly working curved motion blur)
• gun muzzle flash (support for multiple flash sources with a single asset)
• cold breath (multiple breath sources w/ single asset; multiple containers (clustering))
• light snow
• light rain
• "loopable" ground fog (?)
• ground fog above terrain geometry
• ...

all (particle effects) should have the following properties:

• ability of producing non-changing topology (with the pscale-down-instead-of-death technique)
• accurate sub-frame behaviour (e.g. fast-rolling debris, curved sparks motion, etc.)
• when multiple effects are created (e.g. muzzle flash), the results should be structured to be easily exportable (e.g. alembic hierarchy with one object per effect, etc.)
• ...