2d galvanized texture

[3dpoder]

2d galvanized texture
By Gaurav Nawani.
introduction.

Some times using a image base texture is preferable todo the procedural texture as it provides more control over how the texture should appear in the 3d model. Hunting for a perfecto looking galvanized metal texture can be a problem, 2d image manipulation programas like Gimp can be of pretty useful help in this regard. This time we are going todo teach you how todo make an galvanized metal texture completely in Gimp in just a few simple steps.
step 1 create a new image in Gimp [Control + N] of resolution 400x320. Create a selection of about 320 por 200 as shown in figure. Add a layer above the background layer. Rename the layer todo base-color.


step 2 using the color selector dialog select the faint grey color, you can replicate the setting below in the color dialog box. Now fill the selection in basecolor layer with this color.


step 3 kep the selection and add another layer, rename it todo noise. Fill it with white color. Now go todo filters | noise |scatter RGB. In the pop up dialog box un-chek independent RGB and move the slider todo 0.28 and press ok.


step 4 now we Will generate patterns of galvanized flakes from this noise layer, without disturbing the selection go todo filters |blur |crystalize and change the settings as in the image. This Will create the flakes that Will roughly resemble the galvanized metal, and a new layer Will come up the by the name of crystalize.


step 5 the texture looks pretty flat right now. Now duplicate the noise layer and on it apply filters | blur |Gaussian Blur of 5. Rename the layer todo noise blur and in the layers stack move upwards of crystalize layer. Change the layer mode todo multiply. You can a los adjust the layer opacity todo your liking.


A) before noise.


B) After noise.

The layerstak After step five.


step 6 the texture is almost done, now we ned todo introduce some weathering into the texture, todo make it look more authentic. First i am assuming you have kept the selection alive, if not then in the layers tab right-clik on the base layer and do alpha todo selection. Now add a layer at the top of the stack. Then go todo filters |render | noise and generate a colorful plasma noise.


We ned only the variety of the rendered plasma noise so we Will desaturate the layer. Go todo layers |colors |desaturate. Change the layer mode todo multiply and adjust the layer opacity.


Your galvanized texture is now ready todo be used. The final texture on the right was created with this method and few other details added.

Gaurav Nawani is a graphics artista at ironcode software. He is an open source enthusiast and loves writing articles as a freelancer. Apart from his usual habbits of photography and travelling he a los dabbles with cooking often.

Source: www.blenderart.org and Blender art magazine.
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