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Rendering Corrugated Metal Cladding

Does anyone have a suggestion how to render a perforated and corrugated metal cladding. The original material is shown in the photo below. Each fold is about 2 1/2".

I use VectorWorks but I am looking for a general approach so I would appreciate answers from users of other programs.

 
Mar 26, 08 7:28 pm
mleitner

Just to elaborate the question a bit:

1. Would you use a texture map build an actual object?
2. How do you convey the transparency created by the perforation?
3. How would could you imitate the depth of the folds?

Mar 26, 08 7:40 pm  · 
 · 
xtbl

i have limited 3d modeling experience, but from what i remember from my formz class 4 years ago, you'd use a transparency map to create the holes, and perhaps a bump map for the corrugations.

i'm sure others will have more detailed help.

Mar 26, 08 7:57 pm  · 
 · 
Carl Douglas (agfa8x)

Depends on how far the material will be seen from. If it's up close, then you need to model the square corrugations, and use a texture for the hex mesh. If it's only seen from a distance, then you are probably looking at three maps:

1. a metal material colour map
2. a hex mesh transparency map
3. a corrugated bump map.

Mar 26, 08 7:59 pm  · 
 · 
mleitner

Thanks for the help. I'm working on making it happen (bump map is giving me a tough time), only a matter of time.

Mar 27, 08 11:55 pm  · 
 · 
garpike

1. I typically model the corrugations and use a transparency map for the perf.
2. Use a texture map (or in this case, call it a transparency map)
3. Model it the folds. It's precise.

Mar 28, 08 12:09 am  · 
 · 

i haver tried both methods above. garpikes gives best result, including from a distance.

Mar 28, 08 5:29 am  · 
 · 
trace™

Model the profile, texture map the pattern. This is the only way you'll get accurate highlights.

Mar 28, 08 8:36 am  · 
 · 
mleitner

As suggested I modeled the corrugation and then applied a transparency map. The bump map just didn't result in the depth needed.
Now I just have to get the reflectivity and color tone right.
Thanks!

Apr 2, 08 12:59 pm  · 
 · 
strlt_typ

model one hexagon
array
copy/paste/rotate

Apr 2, 08 1:54 pm  · 
 · 
med.

I would just be afraid that if you modeled the corrugation it would eat up tons of ram and tank your system.

Like everyone said above, I would just create a transparency map with a bump map of the corrugated pattern.

Apr 2, 08 3:31 pm  · 
 · 
rehiggins

bump mapping is for subtle surface variation and does not actually manipulate the model geometry (it's typically only a tweak of light/shadow effects)--To get the look of corrugated metal (at the range of the image above) you would need to use a displacement map which is an actual transformation of the model geometry done at render time. Sometimes displacement maps end up being just as 'heavy' as actual geometry though…

Apr 2, 08 5:47 pm  · 
 · 
Appleseed

Model the the fold, use a transparency map for perfs.

Apr 2, 08 6:28 pm  · 
 · 

in revit

model the actual material with the folds and thickness 

then find an image of a hexagon martial, use Photoshop to create positive and negative of the hexagon cutouts. create a new material and use the image for bump and cutouts 

and in render display it should look like this (this is using a fence )

Sep 22, 14 3:12 pm  · 
 · 

The original post was from 6-1/2 years ago. Maybe the OP figured it out in that time. Or not.

Funny to note (also) that the OP posted 22 new topics and zero comments.

Sep 22, 14 5:12 pm  · 
 · 

Oops sorry for bringing up this old topic didn't pay attention to the date I was searching for corrugated metal and found this topic and since I did something similar I thought to give my two cents 

Sep 22, 14 8:51 pm  · 
 · 

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