Howto:Modeling Ground Signs with Blender: Difference between revisions

Howto:Modeling Ground Signs with Blender (view source)

Revision as of 20:53, 26 June 2006

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 [[Image:Ground_marking_full_example.jpg]]
+=== Adding some realism to the texture ===
+Aircraft and ground vehicles do move above those markings, that makes them dirty after a short while. I like adding a touch of realism to the textures I use into my Flightgear models. Adding some dirt to the ground marking is pretty easy. I'll show you how to modify the texture with Blender, you can use similar techniques with every common graphic editor.
+Open up Gimp and load the file catii-iii.rgb
+Create a new layer by SHIFT clicking on the left button of the Layers Dialog Box:
+[[Image:catii-iii_addon_html_21146099.jpg]]
+In the image window, go to: Filters -> Render -> Clouds -> Plasma ...
+You can customize the Clouds rendering settings in order to get a nicely random cloud rendering. Now, you just use what I suggest in the picture and hit OK. It does not matter if it looks colored now, we will convert to greyscale and use the light values only to add some noise to the underlaying layer.
+[[Image:catii-iii_addon_html_1dad0e33.jpg]]
+You will get this in your image window.
+[[Image:catii-iii_addon_html_m30fea806.jpg]]
+Erase the saturation with: Layer -> Colors -> Desaturate
+[[Image:catii-iii_addon_html_7db38b6e.jpg]]
+Return to the Layers dialog box, change the clouds layer mode to Multiply and the Opacity to 40.
+[[Image:catii-iii_addon_html_54e9cda0.jpg]]
+I also tend not to use huge texture files, that's why I rescale it to smaller resolution; keep in mind that we need it to be a multiple of 8; in this case I decided a 256x128pixel resolution will look good enough. In the image window: Image -> Scale Image ...
+[[Image:catii-iii_addon_html_23b912fa.jpg]]
+Unlock the resolution proportion constrain by clicking on the little chains at the right of the Image Size resolution boxes (the chain opens up in two pieces), then set Width:256, Height:128 and hit Scale.
+[[Image:catii-iii_addon_html_m19c5fb92.jpg]]
+Now the image is ready to be saved with RGB format as usual, and can replace the old one. The result in Flightgear looks more realistic then the previous one, that bit of dirt smooths out the visual break caused by the perfectly clean texture used before. It integrates better with the surrounding taxiway texture.
+[[Image:catii-iii_addon_html_a5eaae.jpg]]
 I hope you will enjoy this little lesson. Consider this as an example, because there are a lot more things to do with the XML animations provided by Simgear to Flightgear.