Make Seamless/Shift and Blend

This function makes a texture seamless by blending it with its shifted copy. The predefined blending curve was selected in such a way, that the texture's borders fade out.

	You can limit the function to shift the texture only horizontally or vertically. This is useful if the texture is already seamless in one direction.
	If you have decided to use the function in both directions, the Displace value controls how the vertically shifted copy is displaced horizontally. Values between -25% and 25% are meaningful here.