Variable Linear Blur filter allows you to control the effect power within the frame. You could have the effect appear only at some image side rather than over the entire image. Parameters: Blur Type "Constant" mode represents the real motion blur effect while "Soft" adds subtle directional blur. One-Way variations add not only motion blur, but a visual motion also. Size Controls the blur power. Value of 1.0 sets the maximum blur, but you can enter in edit field values from -4.0 to 4.0 and get more blur, but with a slightly reduced quality. Negative values set opposite-direction blur for One-Way modes. Area Controls how large the soft area is. 0.0-none, 1.0-whole image. By keyframing the Area control, you can wash the blur effect across the screen. Direction Controls the blur direction. Value of 1.0 = one full rotation (360 degrees). You can enter values up to 100.0 and create direction animations (rotating direction). Side Controls the position of the effect area. 0.0-left, 0.25-top, 0.5-right, 0.75-bottom. You can enter values up to 100.0 and create side animations. Distribution Higher values soften the boundary of the effect mask. See also Linear Blur variations: Linear - Blur an image in one direction. Linear Blend - Blur an image and blend with the original. Variable size - control the blur power within the frame with a Radial Mask.