# rough plaster\_strange result

**URL:** <https://forums.chaos.com/t/rough-plaster-strange-result/21598>\
**Category:** Issues\
**Created:** [August 24, 2009, 11:40am UTC](https://forums.chaos.com/t/rough-plaster-strange-result/21598 "2009-08-24T11:40:25Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![max\_montana](https://avatars.discourse-cdn.com/v4/letter/m/bc8723/32.png) [@max\_montana](https://forums.chaos.com/u/max_montana)\
**Post date:** [August 24, 2009, 11:40am UTC](https://forums.chaos.com/t/rough-plaster-strange-result/21598/1 "2009-08-24T11:40:25Z")

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i face the problem, that i get a strange result as i want to make a facade with a rough plaster structure.  
i use a celular map as bump map, and it works just fine on the balcony. but on the parts of the facade below it gives a strange result.  
both objects are extruded splines. i work with max9+vraysp3a  
hi there,

 ![celular map-size2,0 in bump-200.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/6/d/6d57293a341f73fa0cc8febe6c36a37d83d6049d.jpeg)

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**Author:** ![pixela](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/pixela/32/2876_2.png) [@pixela](https://forums.chaos.com/u/pixela)\
**Post date:** [August 24, 2009, 12:00pm UTC](https://forums.chaos.com/t/rough-plaster-strange-result/21598/2 "2009-08-24T12:00:41Z")

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It can be because of double faces.

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<div class="post-metadata">

**Author:** ![kein\_plan](https://avatars.discourse-cdn.com/v4/letter/k/9e8a1a/32.png) [@kein\_plan](https://forums.chaos.com/u/kein_plan)\
**Post date:** [August 24, 2009, 12:11pm UTC](https://forums.chaos.com/t/rough-plaster-strange-result/21598/3 "2009-08-24T12:11:03Z")

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yes. looks like double faces, double geometry…

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<div class="post-metadata">

**Author:** ![max\_montana](https://avatars.discourse-cdn.com/v4/letter/m/bc8723/32.png) [@max\_montana](https://forums.chaos.com/u/max_montana)\
**Post date:** [August 24, 2009, 4:11pm UTC](https://forums.chaos.com/t/rough-plaster-strange-result/21598/4 "2009-08-24T16:11:45Z")

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thanks for your replies,  
its not coplanar geometry, but the fact that just the above side of an extruded object has this strange appearence.  
any suggestions how i can fix this?

 ![extrusion direction.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/5/3/53a77a32bb45a028d5f9a20a44aa4bc6b2a35dfd.jpeg)

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**Author:** ![3DMK](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/3dmk/32/388_2.png) [@3DMK](https://forums.chaos.com/u/3DMK)\
**Post date:** [August 24, 2009, 7:41pm UTC](https://forums.chaos.com/t/rough-plaster-strange-result/21598/5 "2009-08-24T19:41:02Z")

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Are your objects using the same UV mapping?? Have you scaled any geometry??

Try collapsing your 2 objects into one object…put your UV map on top of the collapsed object & all problems should be solved.

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<div class="post-metadata">

**Author:** ![max\_montana](https://avatars.discourse-cdn.com/v4/letter/m/bc8723/32.png) [@max\_montana](https://forums.chaos.com/u/max_montana)\
**Post date:** [August 25, 2009, 10:19am UTC](https://forums.chaos.com/t/rough-plaster-strange-result/21598/6 "2009-08-25T10:19:45Z")

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thanks for the hint.  
didnt use uvw map as i used a procedural map.  
it works with uvw mod on each object first and then connect the objects.