Use the brush by positioning it over the star you want to add spikes to and then click the mouse button. Your screen should now look like Figure 4, and hopefully your image will look something like some diffraction spikes! Finally, in the Layers panel on the bottom right hand side, adjust the opacity of the Background copy layer to 50%. Rotate the image 90° clockwise or anti-clockwise ( Image, Rotate Canvas, 90° cw) and paste back the image from the clipboard ( Edit, Paste). We now have a copy of the line in the clipboard. With the Background copy layer selected, from the menu Select, All and then Edit, Cut. Notice we now have two layers again: Background and Background copy. Your screen should now look like Figure 3. Next, make a copy of the background layer: Layer, Duplicate Layer. Merge them into the one layer by selecting Layer, Flatten Image from the menu. Let’s now turn this line into a crossed set of diffraction spikes.īefore we do though, notice that in the Layers panel (bottom right hand side of Figure 2) that we have 2 layers: Background and Shape 1. You should end up with something like Figure 2. Set the Angle to 0° and, with the Preview box checked, play around with the Distance parameter to get the effect you like. To “taper” it and fade it at the ends so it looks like a diffraction spike, we will use the Motion Blur Filter: Filter, Blur, Motion Blur. The line looks pretty harsh, and not much like a diffraction spike. The image should now look like Figure 1 with a white line 2cm long through the middle of the image. Click on the Info Tab on the right hand side of the screen – this will help you to see accurately where the cursor is in the image to help get the line straight. Select the Line Tool (refer to Figure 1). This will make accuracy when drawing easier. Before we do, select the Zoom Tool, and zoom in to 200%. We will start to construct out diffraction spike brush by drawing a horizontal line through the middle of the image. If the rulers are not displayed along the side of the image, select View, Rulers (or press Ctrl R) to turn them on. This will help you to find the centre of the image, and select Background Colour for the Background Contents. Start by opening Photoshop and making your foreground colour white, and the background colour black.Ĭreate a new file: File, New. Photoshop CS3 was used to develop this article, but it doesn’t matter what version of Photoshop you have, you should be able to follow this method. You can if you want also create a range of different diffraction spike brushes so you can have long, fine spikes or shorter ones – its really up to you. This article describes how to make your own Diffraction Spike brush for Photoshop, so you can add artificial diffraction spikes to your images. Photoshop can also be used to add diffraction spikes to your images. ![]() ![]() But those who like the aesthetic effect of diffraction spikes sometime go to great lengths to create them in their images. Some people think they add to the aesthetics of a stellar image, and others just see them as an artefact.
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