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Basics steps to UVingMatthew Hyland CGA

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In this document I will talk about the basic

grips of UVing an object.

I will talk about planar mapping how this

Links to the UV editor and how the UV texture

editor links with Photoshop

This will be the object I will be UVing.

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UVing is the process before coming to texture an

object, it is like unwrapping a cube and seeing its net.

This is the same process for all the objects you create

in Maya, through UVing and planar mapping youcreate a virtual net for when it comes to Photoshop you

will be able to then texture your object with in

Photoshop.

As you see here the object has not been laid out or

UVd, and when coming to texture this in Photoshop, it

would become difficult and unclear what part yourtexturing

With in the UV texture

editor, this is how the

ladder looks.

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This is how a UV gridlooks, you apply the UV

grid just like any other

shader.

As you see here after applying the UV

shader, you can see the texture being

stretched around the shape. This is

how a normal texture brought in via

Photoshop would look, it would lookstretched and distorted.

As you see the texture you have applied has also

appeared in the UV texture editer box.

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In the Maya menu make sure you have

the polygons selected on the dropdown

menu, then locate the Create UVs tab

and go to the Planar Mapping

Make sure on your model you have

highlighted the faces you need UV, UV a

model section by section, for

Example:

Front, back and sides

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Once the Planar Map has been apply this box appears around the object also

highlighting around the edges you are Planar Mapping, the box around theobject is equal to, the textured box with in the UV Texture Editor.

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In the channel box rotate the UV box till it is up right in the

texture editor and then scale the projection to 5 to fit with

the UV editor.

The Larger the number of the projection, the smaller the

UVs will be on the Texture Editor, the smaller the number,

the larger the projection.

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Follow the same

principle for the

sides.

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While editing the UVs for certain sides, be aware that there is a point in the middle

that needs to face outside towards the way the objects face is facing, you alter thisby rotating this around, to see what way the map is facing

by clicking the tool in the corner and this will give you

directional arrows in the middle.

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To make it easier selecting the faces

press space and highlight the faces

from the four windows.

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Laying out the UVsWhen finally Planar Mapping an

object, your UVs would look

bunched up in the middle like this.

This is were you have to sort out

the UVs ready for texturing and

you knowing were to texture.

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First right click face, and then in your main

view select one of the faces on the model.

Doing this will single out one of the faces on

the texture editor. Then hold Ctrl and move

select To UV, doing this will then highlight theUVs surrounding that face

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Once this is done go to select shell

and this will then highlight all the UVs

surrounding.

as you only selected the face on oneof the lay outs, it will only highlight

that faces UVs.

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With all the UVs selected move the shell across. Repeat this cycle, and remember

to place the shells, so that you understand which is which for example, the frontshell to the left, and the back shell to the right, and the left shells to the left and right

shells to the right. Also notice when you move the shells around on the UV Texture

Editor, the texture on the model also moves as well.

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Going back to when we

UVed the steps, all the

shells have bunched up on

top of each other, you can

separate these individuallydepending on how you want

to texture it, but to save

space you can over lay

them.

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By using the front window

view I selected all the steps

by pressing shift, through

doing the same cycle ofholding Ctrl I then selected

all the UVs. I have also

noticed that the UVs are

not correctly aligned.

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By selecting the shall and positioning it, I rotated the shell by using therotates in the corner in the UV Texture Editor. Also again notice as I rotate

the shell, the texture rotates as well.

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Once everything is in order, the shells are ready to be organised to besewed.

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At first you will have to organise the shells into position to be sewed.

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To sew the edges together, right click in the UV texture editor area and

select edge, then highlight the edges, and then click the Move and sew

the the selected edges tool and then the shells will jump together and stick

together.

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The next stage is creating a UV snap shot for it to be ready to go into

Photoshop. You do this by highlighting all the UVs on the Texture editor map,

and then in the Polygons drop down menu, you then scroll down to the UV

snapshot.

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First you rename your UV layout in the

filename after \outUV. As you see in the

box on the right youll see the numbers of

size X and Y at 250. change these to 1050.

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Opening up your UV map into

photoshop

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First you locate the project with in your images folder and click on the

outUVLadder file. The Images file is set with in the Maya project files.

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This is how the UVs look with in Photoshop before

texturing, remember to delete the Alpha channel

depending on what you are doing otherwise when

reloading the texture on to your object, the texture will only

pick up on the wire frame and your main object will looktransparent.