Linear (Motion) Blur filter blurs an image in one direction and creates camera or object motion blur effect. 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. 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). See also Linear Blur variations: Linear Blend - Blur an image and blend with the original. Variable size - control the blur power within the frame with a Radial Mask, or Linear Mask.