This is a compilation of different ways to get nice pointy speedlines without going crazy.

First use the Line Tool to draw your speed lines.

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Then go to the Filter Menu > Blur > Motion Blur

Make sure the Angle matches the direction your line is going in, and tweak the distance to determine just how pointy the line is.

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Make your first anchor at the tip of the speed line. Make your second and third anchors at the base of the speed line. Close the path by clicking on the first anchor. Fill the path.

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First, set your Brush Tool to the appropriate width and then set the Minimum Diameter around 35%. You can set that higher or lower as you see fit.

Again, make the first Pen anchor on the tip of the speed line. Make a second anchor at the base of the line, and then close the path by clicking on the first anchor again. Basically, it folds the line back on itself.

Now right click, choose Stroke, and make sure the Simulate Pressure box IS checked.

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By ‘motion lines,’ I mean the lines on an object indicating speed and movement.

I imagine you could do this with a mouse if you were really, really talented, but I highly suggest only using this method if you have a graphic tablet. Sorry ^^;

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1) Make a new layer. You should be used to this by now ^^

2) Cover the motion lines with white. Usually, I’ll use the Pen Tool to draw a path around the area, fill with white, and then stroke with black on a higher layer. That way it’ll be sure to have a nice border.

Since her arm kind of had two distinct section, I made a layer for each part.

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3) Lock the transparency on the layer so that you can only make changes to the areas that have already been inked (the white area).

4) Set the Brush Tool to 1 px for every 1000 px that your raw is high. So for the 3000 px high raws, I set the pencil to 3 px. On a 1200 px raw, I’d use a 1 px Brush.

Now comes the fun part. Lower the opacity of the white layer so you can see the direction of the motion lines underneath. Set the brush to black and scribble lightly across that area. Since the layer is locked, you will only color on the pixels that have already been colored white.

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5) Set the opacity back to 100% after a few scribbles and continue coloring it in until you get to the darkness you want. If you make it too dark, you can switch to white, add a few white streaks, and then scribble over those in black again.

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Since the raw had a lot of white near the bottom of her arm, I added a few white lines with the Pen Tool after I was done scribbling the motion lines. I tapered the strokes so that they faded nicely into the motion lines (see this tutorial for an explanation).

Then I prepared the second part of her arm by making a new layer and covering that part in white.

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I did the second section exactly like the first and added extra white streaks near the bottom. This is the final product.

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Here are some other examples:

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