The flowmap obstacle SOP makes adding obstacles or modifications based on geometry very easy. Plug in your flowmap and obstacle geometry, and the tool will automatically adjust your flowmap procedurally.
Controls the intensity of the effect of guide on the already existing flowmap.
The division size controls how precise the sampling of the obstacle for the flowmap influence is.
The dilate parameter allows you to dilate and erode the obstacle influence on the flowmap.
The blur strength controls how much blurring has to be applied to the generated influence prior to mixing with the incoming flowmap data.