Step-by-step: Ap­ply­ing rust to a sur­face

ImagineFX - - Imagine nation Artist Q&a -

Be­fore you add rust to any sur­face, you’ll need ob­jects that are made of iron. Rather than paint­ing an ob­ject shiny and new, it will be easier if the sur­face is al­ready dull or matte with dust and dirt on it. That means there’s no need to spend time paint­ing in spec­u­lar high­lights. I’m us­ing tex­tures from www.tex­tures.com, which are free to down­load (with a pre­mium op­tion).

I start off by lay­er­ing the tex­tures as ap­pro­pri­ate. I use the Liquify fil­ter to warp the rust tex­tures so they fit the con­tours of the car. To show the back­ground, click Ad­vanced Mode and Show Back­drop. You can also use Pup­pet Warp or Warp for sim­pler con­tours. Erase the edges of the tex­ture so that it blends with the sur­face of the car, and set the layer to Over­lay or Mul­ti­ply.

Con­tinue to layer tex­tures on the car, while keep­ing in mind how real-life physics would af­fect the weath­er­ing. For in­stance, the con­stant daynight cy­cle would make the me­tals ex­pand and con­tract at dif­fer­ent rates, and there­fore bend the ra­di­a­tor grille and even the body pan­els out of shape. Rust will be worse wher­ever the metal has been scratched or dam­aged.

The image is be­gin­ning to look a lit­tle flat, so I go over it with a sim­ple grunge brush so that it doesn’t seem too clean. I add other de­tails such as a layer of moss, bro­ken glass and re­flec­tions from the en­vi­ron­ment as needed. Be­cause any glass would have be­come grimy and dusty over time, I ap­ply a blur to the re­flec­tions and give them a more matte ap­pear­ance.

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