Displacement mapping

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Pandekage
Posts: 32
Joined: Tue Nov 29, 2011 1:50 pm

Displacement mapping

Post by Pandekage » Wed Nov 30, 2011 3:54 am

I'm trying to create an expanded/perforated metal texture with a displacement map (below), hoping to achieve the below result (this was a render that was done by that exact same displacement map, but with vray). Not finding a good tutorial on this, I created a new material, colored it a rust color, opened the material editor, checked Displace, selected Sketchup from the drop-down menu, and chose the map from the browse button. Then I rendered, and the material didn't show up. Any ideas on how to apply these displacement maps? Then again, it may have rendered correctly, but at a tiny scale. How do I scale up displacement maps? Thanks!

Image

Image

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CTZn
Posts: 7240
Joined: Thu Nov 16, 2006 4:34 pm
Location: Paris, France

Re: Displacement mapping

Post by CTZn » Wed Nov 30, 2011 5:32 am

Hi Pandekage, please use the exporter forum for exporter specific questions in the future. You may obtain specific answers faster, and incidently be more usefull to SU users restricting searches to the SkIndigo forum.

In SkIndigo, the float value field beside the displace parameter is the displacement value in meters. It will scale the displacement along the geometric normals. You can access more options by clicking the [ ... ] button, notably the base value (texture C parameter) wich will drag the already displaced triangles along the geometric normals.

Why the material do not render I don't know.
obsolete asset

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Pibuz
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Posts: 2646
Joined: Tue Dec 11, 2007 7:58 am
Location: Padua, Italy
3D Software: SketchUp

Re: Displacement mapping

Post by Pibuz » Wed Nov 30, 2011 9:45 am

Hi pandekage!
I found your map to work really well, I just added two more to make a material work with SkIndigo, hope you don't mind. Attached are the skp model (enter the gridsheet group, right click and "edit active mesh" to see the displacement parameters), the modified maps (very fast) and the test render. Remember to map correctly the diffuse map onto the surface, so that the other maps find the correct dimensions.
Attachments
testrender.jpg
skp_displaced_metalsheet.rar
(149.74 KiB) Downloaded 280 times
maps.rar
(286.07 KiB) Downloaded 278 times

Pandekage
Posts: 32
Joined: Tue Nov 29, 2011 1:50 pm

Re: Displacement mapping

Post by Pandekage » Wed Nov 30, 2011 12:43 pm

Thank you! I'll try and see if I can adjust it to have the needed red color. That would be the diffuse layer?

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Pibuz
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Posts: 2646
Joined: Tue Dec 11, 2007 7:58 am
Location: Padua, Italy
3D Software: SketchUp

Re: Displacement mapping

Post by Pibuz » Wed Nov 30, 2011 8:07 pm

You can adjust the color in Photoshop. There is a more professional way to handle plain colour and additional maps, but since you seem to be brand new to Indigo and SkIndigo you should try the simpler way :D

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