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FrmBlend FrmBlend

Grid Blend | inBlendMethod – Used for grids when the Play Speed parameter is not exactly 1.0, or the Direct Cache Index for the current timeline frame is fractional, or you have specified a Loop Overlap in Loop mode. In these cases, a single timeline frame must be constructed from two cache files by blending between them. Each time the timeline is scrolled to a new frame, the caches for this frame will be blended again. You can choose between three different methods for blending between grids from cache files. During Resimulation the Grid Blend option will be ignored and the blending will be handled by the resimulation process. Note that particles are blended using a much simpler method and Grid Blend does not affect them:

Interpolation – Simple linear interpolation suitable for slow simulations. This is the fastest method but it does not capture movement well and may produce flickering.
Velocity – Velocity-based interpolation. Produces better results, but works more slowly. Captures well the movement of the fronts of the plumes, but does not work well for smoke moving backwards, and also may produce flickering. It requires an exported grid velocity channel from the Output rollout.
Precise Tracing - Improved Velocity based interpolation for Fire and Smoke simulations. Captures plume movement very well and can handle very low Play SpeedsSpeeds. Requires an exported grid Velocity channel, as well as Advection Origin channel from the Output rollout.

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