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Simple metal texture in Photoshop, waht we use is gradient tool, motion blur effect and add noise.
1. Create new document, with dimension 900px X 600px.
2. Create new layer, with Gradient Tool (G) fill the new layer with these colour #f0f0f2 #85888f
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3. Add Noise Effect, Go to Filter > Noise > Add Noise, with Ammount 20, uniform, monochromatic
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4. Add motion blur effet, Filter > Blur > Motion Blur, Angle 0, Distance: 35 pixels
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5. You're done, like this the result
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