wall displacement tutorial

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naudofr
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thanks !
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vicspa
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Great tutorial, thank you. :thumbup:
EscapeArtist
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Very useful and well done!
Thea + Colimo
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SandroS
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thanks all, glad you found it useful!
joe average wrote:Thankyou SandroS... This is really helpful in understanding quite a few concepts. I have a noob question here.. on a lot of threads I have come across UV mapping. I have a faint idea but I'm not sure how it works and am i supposed to be doing it (when needed in sketchup or not and how).. :?:
well, i've only started doing 'proper' UV mapping the last few months so i'm no expert. i started looking into it when i was reaching the limits of what cubic or planar mapping could do. this is evident at corners of objects and when you want a texture to follow a curve or path for example. basically, UV mapping your objects gives you a lot more control over how the textures appear on your meshes.

also, i think Thea requires a UV map for certain material parameters to work (e.g. displacement but i think there are more) and to see the geometry and materials clearly in the OpenGL viewport.
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Frederik
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joe average wrote:...on a lot of threads I have come across UV mapping. I have a faint idea but I'm not sure how it works and am i supposed to be doing it (when needed in sketchup or not and how).. :?:
For some better understanding about UV-mapping, you can check out Wikipedia UV-mapping...

The short explanation is:
UV Mapping (UV) This refers to the process of re-parameterize a 3D object with dimensions X, Y and Z into a 2D plane with coordinates U and V.
Most texturing requires this step because it tells the program HOW to apply a 2D image map onto a 3D object.
Unfortunately SU doesn't have any good native UV-tools....

Applying a material to a flat surface is easy and will set the UV-coordinates for you, but as soon as the surface isn't flat, you'll have your challenges...

I.e. Applyting a texture to a sphere or cylinder shape is quite challenging, but there's some plug-ins like...
UV Toolkit by Thomthom or the UVTools by Whaat...

In other cases you can use the "Project" option to apply your material to a curved surface, but it doesn't always work that well...
BTW - Alvis recently did a video tut showing how to apply projected textures to a chair...
http://www.youtube.com/watch?v=XRQLS8P7xsY

Hope this can help you further and give you better understanding about what UV-mapping is all about and why it's so important... :)
Cheers
Kim Frederik

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notareal
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Whaat's UVTools 0.2 Pro http://forums.sketchucation.com/viewtopic.php?t=23725 is a good helper if you opt to use some external UV mapping tool with SU.
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naudofr
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Blender is good for UV mapping ... and it's free :D
And it can do a lot of other things as animation, post processing ...
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Gaieus
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Thanks Sandro for the tutorial! :thumbup:
_______

Joe, to simply wrap a texture around the corner in SU, you only need to position it first then sample the positioned material (Alt+Paint) then apply it on the next face.

ThomThom also has a good UV Toolkit (it can now "remember" UV mapping and restore after modifying the mesh provided you do not change the poly count);
http://forums.sketchucation.com/viewtopic.php?t=18992

Here are some tutorials based on this tool:
http://forums.sketchucation.com/viewtop ... 18&t=34072
and
http://forums.sketchucation.com/viewtop ... 18&t=35620
_______

and Tgi3D Amorph (this is $$$ though) too:
http://www.tgi3d.com/index.php?Page=Download

It has a "learning edition" with vertex limitation but free and no time expiration - of there is a fully functional but 30 day only trial.
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joe average
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Thankyou guys for explaining in detail the nuances of UV mapping... Feels a little less alien now. :) Luckily or unluckily i haven't had the need to use it.. but i know what all to read (this thread) as and when the need arises..

Really appreciate the time and effort of all!!

Cheers..!
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Snowy
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Great tutorial! thanks
Erwin van Strien
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