Fluid Node

FLuid NODE

With some special effects FurryBall supports there is the need to let the user change and tune some custom parameters. Fluid Node is another settings node in FurryBall, it is connected directly to a fluidShape and adds several new attributes.

To be able to use attributes described below a fluid node has to be attached to a fluid you want to adjust settings for. To attach fluid node to a fluid, just select the fluid(s) and select 'Add Fluid Attributes' from the main FurryBall menu. There is always a 'New' menu item and a list of existing fluid nodes in the submenu, so you can create and attach a new fluid node or attach an existing one that is already used elsewhere. See User Interface section for more details on other settings nodes.

Attributes

COMMON - In common you can set some of the common fluid features, which are available only in FurryBall

Shadow Transparency - Defines how much are non-illuminated areas of fluid transparent. This feature enables you to create "light shafts" effect very easily.

Maya Volume Sample - When this is checked. Number of samples is not determined in fluidShape, but by the value behind this check box.

Volume Samples - Set the number of samples.

NOTE: Those samples are defined per Maya unit not per voxel. It is very useful. You can even set less than 1 sample per voxel to accelerate rendering (great for tuning scenes)

SHADOWS - The PCF shadow bluring works in fluids too. But it is slow. So we added some possibility how to speed it up. You probably don't need to filter shadows in fluids at all. But when you need to: you can use less samples and having feasible results.

Filter Samples Multiplier - Multiplies number of samples defined in FurryBall Light Node.

Filter Samples Max - Maximum of the shadow samples. This will protect you for waiting too long for your render if you coincidently set too many samples.

PHASE FUNCTION Can be used for having more physically correct results of fluid renderers. Phase Function can be used for approximating light scattering in clouds or smoke. Evaluation of phase function doesn't affect rendering performance.

Evaluate Phase Function - When checked, phase function is used for rendering

Phase Function Intensity - Sets the intensity of phase function

Phase Function Bias - Offsets the phase function value

Fluid from the back (Left without phase function, Right with).

Phase function has maximum effect on the side against the light

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