Smart Matte Shrink

Overview:

Allows for alpha channel choking without compromising the fine detail of the matte. It can shrink the matte from multiple sides, or just the edges facing a certain direction.

Parameters:

Setup Preview:

Shows the state of the selected number of sides and their direction, as well as simulates the affected areas.

Shrink Sides:

Selects the number of angles from which to shrink the matte inwards.

Singe, Double, Tri, Quad.

Angle:

Sets the direction from which the selected number of sides will operate.

Shrink Amount:

The size of inwards shrinking in pixels.

Blend With Original:

Mixes the shrunk alpha with the original alpha.

0 - Shrunk only.

100 - Original only.

Edge process:

Determines what to do with the edge.

Offset - Moves the edge inwards.

Spread - Merges multiple near angles for a softer look without blurring.

Spread Detail - How many near angles will be used for each direction.

Spread Angle - The distance between each of the near angles.

Gaussian - Blurs the edge.

Blur Settings - Selects the size of the blur:

Match Depth - Proportional to the “Shrink Amount” size, giving a blurred edge.

Erode - Larger than the shrink amount size, giving a faded sharp edge.

Custom - Allows to se “Blur Amount X” and “Blur Amount Y” manually.

Do Not Shrink Frame Borders:

Keeps the alpha near the frame borders unaffected. This is desires in cases such as a medium shot where you would not want to have the alpha shrink to cause a gap between the buttom of the frame and the alpha of the object.