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i dont know what's it called in the CG world so here's a screenshot from payday 2 AK-47. it's really just a texture, not an actual holes and bolts.

enter image description here

how do you make those in blender ?

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  • $\begingroup$ They are called Rivets. Take a circle and extrude and scale it . . . $\endgroup$ – VRM Jul 10 '15 at 15:56
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    $\begingroup$ To create such effects with texture only you may want to use normal maps (2 equal meshes + UV mapping etc should be done). For that you still should model all those details first and only then bake a normal map $\endgroup$ – Mr Zak Jul 10 '15 at 16:08
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    $\begingroup$ I suggest to look some tutorial about normal maps baking, like this one: blenderdiplom.com/en/tutorials/all-tutorials/… or this one: youtube.com/watch?v=U7PQGgz1RII $\endgroup$ – Daniil Romanov Jul 10 '15 at 16:35
  • $\begingroup$ i actually know how to model those, but i just want to keep my model's poly to be as low as possible because i'm using subsurf modifier level 2. thanks for your suggestions btw. $\endgroup$ – Tidus yukimura Jul 10 '15 at 16:48
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To fake relief on a surface you use a bump map, where the bright parts of the images will look as if they are sticking out of the surface.

For example in cycles. This plane with only 4 vertex shows fake relief. enter image description here

Keep in mind that this is just a texture and if you look at it from the side it reveals the lack of height or real geometry.

enter image description here

For Blender internal the important setting is setting the normal as influence for the texture's image.

enter image description here

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