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How to stop differant mapping sizes and directions?
Posted: Mon Aug 18, 2008 7:57 am
by Jonkey
Hi
I am adding a carbon fibre material to an object but the maps appear in sections and applied to each individual section of suface so that the object looks patchwork. how do you get around this?
Posted: Mon Aug 18, 2008 8:09 am
by Cadhorn
What program are you rendering out of?
Posted: Mon Aug 18, 2008 8:38 am
by Jonkey
Rhino 4
I've included this image to show the result so far.
thanks
http://farm4.static.flickr.com/3266/277 ... 4629_m.jpg
Posted: Mon Aug 18, 2008 5:16 pm
by lebbeus
your image is too small to see the issue that you're describing, can you post a bigger one?
Posted: Mon Aug 18, 2008 11:35 pm
by Cadhorn
lebbeus, this one's a bit bigger:
Jonkey: is the carbon fiber part all one piece in Rhino? I don't know if that'll help, but it might. I'd definitely move this question to the Rhino forum, this question has come up there many times. Texture mapping in Rhino is ... not the greatest.
Posted: Tue Aug 19, 2008 1:02 am
by Jonkey
the part is one piece in rhino. I'm not that familier with working straight out of Rhino so once i had my scene in rhino i wrote the mxs file and set up all the render stuff in Maxwell. But the part was originally modelled in Pro E.
(some time later)
I talked to a friend and he suggested changing the projector to spherical. this has helped and i am trying a couple of test at present. this has definately helped
Does anyone have any comment on this? Is this the best solution or is there another way.
thanks all
Posted: Tue Aug 19, 2008 2:07 am
by JDHill
Hi Jonkey,
Take a look at the Rhino help file under Object Properties > Texture Mapping. You have pretty much the same mapping tools here that you do in Studio - box/plane/cylinder/etc. Once you get the part from Pro/E into Rhino, you can:
- select the object
- go to the Object Properties window
- in the pull-down, select Texture Mapping
- in the texture mapping window, switch from Default to Custom
- in the Projection pull-down, select the desired mapping type
You can also (in the texture mapping window) check the box that says 'Show Advanced UI' - this will allow you to create multiple mappings for each object. You can also show the selected mapping in the viewport using a visual widget (click Show Mapping) - you can move/rotate/scale this widget using normal Rhino move/rotate/scale commands. In the list at the top of the window, you will notice that your first mapping has been added as 'channel 1' - if you set Maxwell textures to also use Channel 1, then they will use this mapping. In this way, you can set multiple mappings for each object and determine which ones your various Maxwell textures will correspond to.
Cheers,
JD
Posted: Tue Aug 19, 2008 2:08 am
by KurtS
so what happens if you modify the projector in Maxwell to cubic, and apply smoothing?
Posted: Tue Aug 19, 2008 7:06 am
by Jonkey
KurtS wrote:so what happens if you modify the projector in Maxwell to cubic, and apply smoothing?
This turned out to be the best result so far, thanks for that. i tried the cylindrical and spherical projectors but the cubic looks better. now that i know a bit more about the projectors this will make things easier next time.

Posted: Tue Aug 19, 2008 5:19 pm
by Becco_UK
I think a nice UV map would work better, with the carbon painted onto it - takes a while longer but accuarate results are more likely.