Quick one…
Does anyone ever model reinforcement, and does anyone have a good texture for rebar that they use?
Ta
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I would use a rusty-brown color instead of a texture. Unless it’s for a detail maybe…
Textures can bloat your model if they are high-res…
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Agreed. I usually use the stock ‘rusty’ or the patterned one for larger layouts, but for some detailed rendered stuff I was hoping to find something more lifelike…
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I haven’t detail modeled re-bar but I did do some exterior components recently for some client renders and I used one from Chaos Cosmos called Iron Rough Rusty 15cm and added a darker coat layer to it. Worked well for steel that was exterior / exposed.
But I think it depends on how close the render needs to be to the subject - I’d probably try to find a model from the 3dwarehouse to modify and then apply a corten steel or rusted steel material to it, at least using the modeled parts for whatever geometry is close to the camera.
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https://www.artstation.com/marketplace/p/7OyG0/rusty-metal-rebar-texture Here’s one. It’s 1.40 usd but worth it considering how long it would take to make your own plus the associated maps along with it.
Why does it have to be rusty? I understand that rust is bad for the adhesion of the rebar to the concrete so in principle using rusty rebar is not allowed.
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I agree it shouldn’t be rusty in real life, but often times when I render I exaggerate a bit to make it feel ‘more real’ - especially to people who aren’t experts in construction / design.
That said I haven’t rendered rebar for any of my projects - but lots of worn metal, old wood and timber.
Off topic:
Actually it’s the other way round…
The rust is transformed into a protective layer when the concrete hardens. On top of that it gives the concrete a better surface to adhere to.
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Still OT: The reinforcement is protected from corrosion by the concrete itself. This protection weakens over time when the concrete becomes carbonatized, losing its alkalicity. This is a big problem with older concrete structures. New concrete facades are made with stainless steel reinforcement.
The “rust” layer acts as a protection only in structures made from cor-ten steel (steel-copper alloy).
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Medeek Foundation has one in the plugin, but it’s really low res, not really meant for rendering.
Example file in 3D Warehouse:
Agreed, to a degree. We’ve had to be careful how we describe the effects of oxidisation on reinforcement on some projects as, even though the term ‘rust’ is a catch-all when talking about the gingering of rebar when exposed to the elements, it is more specific to describing corrosion.
Rebar starts to turn orange after only a few days out in the wild.
Rebar - Armature.skp (71.8 KB)
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