Use these options to set how nParticles fill selected polygon objects.
Fill Object > 
Opens the Particle Fill Options window. Using Fill Object, you can fill selected polygon geometry with nParticles. See Create nParticles.
- Solver
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Specifies which Maya® Nucleus™ solver the nParticle object belongs to. Select a solver from the drop-down list, or select Create New Solver to create a new Maya Nucleus solver for the nParticle object.
- Resolution
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Specifies the grid along which of nParticles are placed in the geometry along the longest axis of its bounding box. For example, a Resolution value of 20 places nParticles (evenly spaced and not overlapping) along the geometry’ longest axis.
Fill Bounds
Sets the geometry’s fill dimensions.
- Min X
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Sets the lower boundary of the nParticle fill along the X-axis relative to the X bounds of the filled object. A value of 0 is full while 1 is empty. The default value is 0.
- Max X
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Sets the upper boundary of the nParticle fill along the X-axis relative to the X bounds of the filled object. A value of 0 is empty while 1 is full. The default value is 1.
- Min Y
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Sets the lower fill boundary of the nParticle fill along the Y-axis relative to the Y boundary of the filled object. A value of 0 is full while 1 is empty. The default value is 0.
- Max Y
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Sets the upper fill boundary of the nParticle fill along the Y-axis relative to the Y boundary of the filled object. A value of 0 is empty while 1 is full. The default value is 1.
- Min Z
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Sets the lower fill boundary of the nParticle fill along the Z-axis relative to the Z boundary of the filled object. A value of 0 is full while 1 is empty. The default value is 0.
- Max Z
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Sets the upper fill boundary of the nParticle fill along the Z-axis relative to the Z boundary of the filled object. A value of 0 is empty while 1 is full. The default value is 1.
- Particle Density
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Sets the size of the nParticles. When set to a value of 1, the nParticle size will match the grid spacing determined by the Resolution value and the object boundaries. nParticles which overlap with the surface of the geometry are rejected, even if the center of the particle is inside the filled geometry.
- Close Packing
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When on, nParticles are positioned as closely as possible in a hexagonal packing arrangement. Otherwise, nParticles are packed in a uniform grid lattice arrangement.
- Double Walled
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Turn this option on if the thickness of the object to fill is modeled. (for example, a mug). Otherwise, the nParticles will be created inside the wall. Double Walled may not handle all double thickness geometry in the same way.
For example, when a polygon torus is filled with nParticles, the center region of the object may be filled rather than the space between the geometry's walls. In cases similar to this, create an internal wall using a separate mesh, and then fill the internal area with Double Walled turned off.