Liquids attributes
A number of new attributes let you generate fluid effects that look and behave like real liquids.
These new attributes include:
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New liquid simulation methods let you select a solver that best suits your effect. When is on, you can select either or as your .
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Specifies the density value at which the solver differentiates between liquid and air when the simulation method is used. Liquid densities are calculated as incompressible fluids while air is fully compressible.
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Applies a downward force to areas in the fluid that have density lower than the value specified by the attribute. When is set to 0, no force is applied. Increasing the attribute value increases the strength of the downward force.
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Mass Range
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Defines the relationship between mass and fluid density when the simulation method is used. At high values, dense regions in the fluid are much heavier than the empty regions, simulating a relationship similar to water and
air.
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Applies a force that simulates surface tension based on the density in the grid. is similar to , but rather than modifying density values, modifies momentum by adding small amounts of velocity to the fluid.
You can use with to create realistic surface tension in your liquid effect.
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Smooths ranges of density into round shapes, making the density boundaries more defined in the fluid. You can use to create effects that are similar to surface tension in liquids.
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Applies an outward force to counter the compression that can apply to fluid density, particularly along container boundaries. In this way, the attribute attempts to conserve the
overall fluid volume with no density loss. For example, in a water tank simulation, fluid may appear to collapse or drain
without sufficient .
specifies the density value at which is applied on a per voxel-basis. For voxels that have density lower than , no is applied.
and can also be used with the default fluid solver method when is off.
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Fluid performance improvements and additions
Maya 2012 includes meshing performance improvements and new output mesh attributes.
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Using , you can now choose the type of polygon mesh used to generate your fluid output mesh.
Mesh Smoothing Iterations
You can apply smoothing iterations to your output mesh to increase quality and uniformity of its surface.
Fluids output mesh performance improvements
Maya 2012 includes performance improvements when converting a fluid object to a polygon mesh. These improvements are most
noticeable when using or as the .
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Sets the amount of air required to completely burn a set volume of fuel. For example, to burn a volume of gasoline requires
15 times more air than fuel. To simulate a gasoline fire, set to 15.
You can access from the section of the attributes.
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A new attribute has been added to the grid to simulate the effect of temperature on gases. The attribute simulates the increase in pressure that results when a gas gets hotter and quickly expands.
specifies the temperature value at which is applied on a per voxel-basis. For voxels that have temperature lower than , no in applied.
You can access and from the section of the attributes.
specifies the number of empty voxels added between the fluid container boundary and regions of positive density in the fluid.
lets fluids flow more naturally near auto-resized boundaries and is useful for fast-moving and low density fluids.
Auto Resize In Substeps
A new attribute lets you resize a fluid container each substep. In previous versions of Maya or when is off, fluids only resize one voxel per simulation step. With on, fast moving fluids resize more accurately especially when a higher number of substeps are used.
A new allows fluid emission to be computed each substep rather than once per step. is useful for effects that have fast emission speeds such as explosions.
Fluid playback improvements
With improvements to the fluid interactive draw, fluid effects now play back faster. Better performance is most noticeable
when playing back textured fluids or cached fluid effects. The interactive draw improvements also provide faster real-time
manipulation (tumble, dolly, rotate) of fluid containers, particularly when using internal lighting ( turned off) for the effect.
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