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Creating an alpha mapped texture with GIMP About Truespace Archives These pages are a copy of the official truespace forums prior to their removal somewhere around 2011. They are retained here for archive purposes only. Creating an alpha mapped texture with GIMP // Archive: Tech Forum 1  |   Order by default Post by Jack Edwards // Apr 4, 2007, 9:37pm Jack Edwards Total Posts: 4062 This is one of those things that I find that I don't do often enough to remember when I need it, so here's a little tutorial that hopefully others will find useful as well. I'm using GIMP 2.2.13 for this one. GIMP can be downloaded here: http://www.gimp.org/ To get started create a new image 5155. Fill the image with Black: 5156 Next we need to make a new brush. Click on the Brushes tab and right click on any existing brush. Select "New Brush" from the pop-up menu: 5157 A 50 radius soft edged brush should be large enough for what we want to do, so set the new brush settings as follows: 5158 Select the new brush just created and the paint brush tool: 5159 Post by Jack Edwards // Apr 4, 2007, 9:42pm Jack Edwards Total Posts: 4062 Set your foreground color to white and using the paint brush tool with the Opacity set low, paint yourself a nice cloud. Make sure to leave dark and mid tone areas because those are what are going to be transparent in the final texture: 5160 Once happy with your cloud, click on the layers tab and right click on the background layer. Then select "Add Layer Mask": 5161 Choose "GreyScale copy of layer" and click "ok": 5162 You should have the following: 5163 Save your results in a tga file: 5164 It'll pop up a bunch of windows complaining, but just click "confirm" and "export" and "ok". Now lets go on to the TrueSpace part. Post by Jack Edwards // Apr 4, 2007, 10:27pm Jack Edwards Total Posts: 4062 Once in TrueSpace, click on the icon to bring up the material editor: 5173 Right Click in the middle of the color panel to open up the color map window and Click on "Texture Map" (the purple Caligari leaf image): 5169 Right Click on the button under the texture. Browse to where you saved the AlphaCloud.tga texture. Select it and click "Open": 5174 Click to on the blue ball icon above the texture map in the color shader panel to open the transparency flyout. Then select "Transparency Map": 5170 Right Click on the button in the Transparency section of the material editor, browse to your file, select it again and choose open: 5171 Post by Jack Edwards // Apr 4, 2007, 10:35pm Jack Edwards Total Posts: 4062 Now create an object with your new texture or paint it on an existing object. Here you can see it in Player side on a plane above another plane painted blue: 5175 Enjoy! -Jack.

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