[3D particle emitter] Add an emission zone radius - #2277
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…ission direction - New "Emission zone radius" property (and action/condition/expression): particles are emitted from a disc instead of a single point, which makes rain and snow falling over a whole area possible with one emitter. 0 (default) keeps the previous behavior. - Document that particles are emitted along the local Z axis (upward by default) and that rotating the instance aims them, that the instance size has no effect, what "Gravity top" means, that a duration of 0 emits forever and that trail lengths are counted in frames. - The editor helper draws the emission zone. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QBkxGKMZRhcVGE95HfLf4p
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Pre-made rain/snow assets to come :)