3D Creative December 2015

3DCREATIVE MAGAZINE | Creating textures for sci-fi spacecraft
Make different adjustments to a texture to use it as rust
Adding rust: For the rust effect, I want
12 to add some orange/reddish patches
around the model, but I don’t want to paint
them by hand, so for this one I use a burnt
texture from Total Textures v19: Destroyed &
Damaged. At first glance, the chosen map doesn’t
have the characteristics I want, but with a bit of
manipulation in Photoshop I obtained exactly
what I’m looking for.
Generate a dirt map in Substance Designer using the Metal Weathering Filter
I first copy the map around all the canvas, then
put it in Color blending mode and play with the
blending options inside the Layer Style window.
At this point I’ve got the reddish patches I want,
but they’re missing contrast, so I make some
Levels adjustments and it’s done. I copy the same
layer with all its blending adjustments (without
the Levels adjustment) to the roughness map, but
I need it to be white so I desaturate the map and
set it to Color Dodge mode.
For the metalness map, I again copy the layer
with its blending adjustments, but this time I use
it in Subtract mode to have it in black. It is almost
invisible to the eyes if you look at the metalness
map, but the rust texture is there doing its job.
Dirt pass: I don’t paint the dirt by hand,
13 and I don’t use any texture for it either.
On this occasion, I use Substance Designer to
generate the dirt. In Substance Designer, I first
create a Metalness/Roughness Graph. I add a
3DCREATIVEMAG.COM