![]() ![]() If the distortion appears twisted, add more correspondence points at distinguishing points along the masks. You can only manipulate correspondence points when the effect instance is selected in the Effect Controls panel.Ī mask can have an unlimited number of correspondence points, but the more correspondence points it has, the longer the effect takes to render. You move the correspondence points with the Selection tool and add and remove correspondence points with the Add Vertex and Delete Vertex tools, which you activate by holding the Alt (Windows) or Option (macOS) keys. To precisely control the distortion, you can add, delete, or move the points on either mask. ![]() These points appear in the Composition panel and control the interpolation of the distortion through space. Shows the number of points on the source mask that are associated with, or mapped to, points on the destination mask. Select Wrap Pixels Around to copy pixels displaced outside the original layer boundaries to the opposite side of the layer pixels pushed off the right side appear on the left side, and so on. Select Expand Output to allow the results of the effect to extend beyond the original boundaries of the layer to which it's applied. If the control layer isn't the same size as the layer to which the effect is applied, it's centered, stretched, or tiled, depending on the setting for Displacement Map Behavior. If you want to use the control layer with its effects, precompose it. The effect uses the control layer specified by the Displacement Map Layer without considering any effects or masks. A color value of 128 produces no displacement. A color value of 255 produces maximum positive displacement. A color value of 0 produces maximum negative displacement (–1 * maximum displacement). The displacement amount is calculated by multiplying the converted value by the maximum displacement amount you specify. Each value is converted into a scale ranging from -1 to 1. The displacement is determined from the color values of the displacement map.
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