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ilter, but if you39。s not falling straight down. It39。s my image after painting along the top and bottom of the waterfall to remove the blur from those areas: Photoshop Tutorials: The image after cleaning up the areas around the waterfall by painting with black on the layer mask. In most cases, you could stop here and your effect would be plete, but in my case, there39。s my image after applying the Motion Blur filter: Photoshop Tutorials: The image after applying Motion Blur. Step 4: Add A Layer Mask To The Waterfall Layer The motion blur effect looks nice, but it needs a little cleaning up since the blur is extending outside the edges of the waterfall. We can clean it up easily using a layer mask. To do that, with the waterfall layer selected, click on the Add A Layer Mask icon at the bottom of the Layers palette: Photoshop Tutorials: Click the Add A Layer Mask icon at the bottom of the Layers palette. This adds a layer mask to the layer, and you can see the layer mask thumbnail now in the Layers palette: Photoshop Tutorials: The layer mask thumbnail now appearing in the Layers palette. Step 5: Paint With Black On The Layer Mask To Clean Up The Blur Effect Press D on your keyboard to quickly reset your Foreground and Background colors, so black bees your Foreground color. Then grab your Brush tool from the Tools palette: Photoshop Tutorials: Select the Brush tool from the Tools palette. You can also press B on your keyboard to quick