Removing Particles

Sometimes it is necessary to remove misbehaving particles during a simulation – a typical task for RealFlow's "Particle Selection" tool. You can find it under Tools > Particle Selection.

Let's assume you have simulated a standard particle fluid scene (only this type is supported) and detected some particles you want to remove:

Selected particles are displayed in green.

Stop the simulation and go to the frame where the misbehaving particles appear.
Select the emitter.
Open “Particle Selection” - a green frame appears around the viewport.
Draw a rectangle around the region of interest – selected particles are displayed in green (see first image above).
If you want to add particles to the current selection use the Shift key.
Particles are deselected with the Ctrl/Cmd key.
Click on “Add Group” to store the selection. A new group is created under “Selection”.

Now the particles are stored temporarily and can be deleted with “Remove particles”, but there is one important step left:

Right-click on the emitter in the “Nodes” panel.
From the context menu choose Export > Export now... to save the new state.
Resume the simulation from the current frame.