pdnnoob Posted December 12, 2012 Share Posted December 12, 2012 This tutorial is available as a PDF, click here to view or download >> SphereExtrusion.pdf EDIT: forum is rather buggy right now...it's not letting me post the whole thing EDIT#2: I got around the problem by putting the whole thing inside hide tags... Today, we are going to learn to extrude 2D objects (ex: text or continents) from the surface of a sphere. (requested by sashwilko) Plugins needed: Shape3D* Magnifier* Tansparency Adjustment Bevel Selection AA's Assistant Alpha Mask Grim Color Reaper *use shape3D if you have an object that was originally taken off a sphere (ex: a world map). Otherwise, use magnifier. I will be using Shape3D for this tutorial because there are more steps involved. For this tutorial, I will be using this map IMPORTANT: If you are not following this tutorial exactly (and even if you are), feel free to adjust some of the settings to your liking! The settings I chose are not perfect for every situation, and even I decided to make further adjustments at the end of the tutorial! Procedure: 1. Paste the map into a blank image. I'm going to start by shrinking the image to 25% the original size because that is one heluva big picture. 2. The map is a little too detailed for our purposes, so simplify it using Median (Effects>Noise>Median). Zoom in on Canada while you do this because that's where most of the problems are (not intended to be offending in any way). I set my radius to 2 and percentile to 75 3. Next, we need to make everything either black or white because gray will result in semi-transparent areas and that's no good. Open up the brightness/contrast adjustment (ctrl+shift+c or Adjustments>Brightness/Contrast) and set contrast to 100. 4. (Optional) Use the paintbrush tool to remove the really tiny (1-4 pixels) islands because they tend to look like needles sticking out of the sphere when you are done, especially when they are all alone. 5. Open up Shape3D (Effects>Render>Shape3D) and change the following settings: ~Camera angle: 1.0 ~Anti Alias: on ~Lighting: off ~Object rotation: as desired ~Scaling: (optional) see screenshot This will be your base layer and, later, will determine the color of the oceans later 6. Duplicate the layer and use Grim Color Reaper to remove the black on the new layer. 7. Duplicate the layer twice. You should now have three layers with just the continents on them and one layer on the bottom that has continents and oceans together. 8. Go to the third layer (the one I named “continent extrusion”) and pull out your magic wand. Set tolerance to 0% and selection mode to global, then click on some empty space. Now invert the selection so you have all the continents selected (ctrl+i) 9. Use the bevel selection plugin (Effects>Selection>Bevel Selection) with strength set to 1.00 Set the bevel radius to something from 5-15. This will create the lighting on the edges of the object, so figure out where you want the light to come from and adjust accordingly. Once you have that done, press esc to deselect. 10. Now the real magic begins. Zoom blur (Effects>Blur>Zoom Blur) with the focal point at the center of the sphere. The amount of zoom used determines how far the continents will pop out. Then, use the transparency adjustment to make it completely opaque 10a. (optional) run Basic Antialias, then AA's Assistant at default settings to reduce the pixelation around the edges. 11. Go to the top layer and select the continents using the magic wand technique from step 8. Resize the selected pixels to match the zoomed image. (see yellowman's tutorial for help) 12. Now for some color. Select the base layer (the one with the oceans) and open up the curves adjustment (ctrl+shift+m). Set it to RGB mode and play with the checkboxes at the bottom and the points on the left. For help on the curves adjustment, see PrettyDarnNeat's curves tutorial. Now you have your basic 3D effect. It seems to be missing something...lighting! Lighting can be done a number of ways, but I like to make it tedious. Here's how! 13. Remember that layer from step 7 that we haven't touched yet? Select it and use the drop shadow effect (Effects>Object>Drop Shadow) with 2 widening radius and “keep original image” unchecked. Play with the blur radius and X and Y adjustments until you get something you like. Woot! Shadow is done! 14. Merge the top three layers together. You should now have only two layers—the raised continents and the base planet 15. Select the base layer and duplicate it twice. 16. Pick one of the new layers and use brightness and contrast (ctrl+shift+c) at 100 brightness and -100 contrast. This will be the highlight layer. 17. Go to the other new layer and make that one -100 brightness and 0 contrast. That will be the shaded area. 18. Get out your radial gradient tool and set it to transparency mode. Make sure you are on the highlight layer, decide where your shiny spot will be, and left click and drag from that spot to the farthest edge of the planet. 19. Go to your shadow layer and right click and drag from and to the same spots twice. 20. Duplicate the continents layer and press ctrl+shift+c then press enter (to set brightness to -100) 21. Right click and drag as in step 19, then adjust the layer opacity as desired. 22. Flatten the image (ctrl+shift+f) Congratulations! You're finally done! 23. Just kidding. You forgot to show off your new picture on the forum Another example (I used the Magnify plugin for this one) 6 Quote No, Paint.NET is not spyware...but, installing it is an IQ test. ~BoltBait Blend modes are like the filling in your sandwich. It's the filling that can change your experience of the sandwich. ~Ego Eram Reputo Link to comment Share on other sites More sharing options...
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