A repeating texture is a texture created
by tiling or repeating an image in a grid. A seamless repeating
texture is one where you cannot see the border of each tile because
the images match continuously at each tile edge (like aligning a
wallpaper pattern at the edges of the paper).
You can create seamless
repeating textures in Paint Effects using
the wrap feature. The wrap feature enables you to paint across the
edge of a canvas and have that stroke continue on the opposite edge,
as if the canvas were wrapped into a cylinder and joined at the
edges. You can wrap the canvas vertically, horizontally, or both.
To create a seamless repeating texture
- Create a new file texture. For details,
see the Shading guide.
- Using the middle mouse button, drag the
new file texture from Hypershade onto
the canvas. The Paint Effects New Texture window
opens.
- Type a name for the new image in the Image
name box or click the folder icon and select an existing
texture. By default, the image will be stored in the sourceimages
directory for the current project.
- Set the canvas size, if necessary. For
textures, you typically use a square canvas (for example, 256 x
256 pixels, or 512 x 512).
- Click the Background color box
to open the Color Chooser, select the background
color for the image, and then click Accept. For
information on using the Color Chooser,
see the Basics guide.
- Click Apply Texture.
- Do one of the following:
- In the Paint Effects Globals window
(
Paint Effects > Paint Effects Globals), make
sure the appropriate Wrap options are turned on. Turn on Wrap
H to wrap the canvas horizontally, Wrap
V to wrap the canvas vertically.
- On the canvas toolbar, click the appropriate
wrap button(s).
- Paint the canvas. For information on
painting the canvas, see
Paint on the canvas.
When you paint over the wrapped edges, the brush stroke continues
on the opposite edge.
- Open the file texture in the Attribute
Editor, click the place2dTexture node tab, then expand 2d
Texture Placement Attributes.
- Turn on Wrap U and Wrap
V, as appropriate to replicate the texture outside the
coverage area in the U or V directions, or both.
- In the Repeat UV fields,
type the number of copies of the texture map you want mapped within
the coverage area along either the U or V parametric surface directions
or both.
The texture will wrap
seamlessly on any objects its shader is attached to.
Roll the canvas
If
you wrap the canvas, you may want to display the area where the
edges join. You can do this using the roll feature. The roll feature
rolls the canvas as if it were wrapped into a cylinder, so that
the images move continuously from left to right, or from top to
bottom.
This feature is also
useful if you do not use the wrap function but want to correct any
seams created at the edges of the canvas. In the following example, the
canvas was rolled 50% vertically (top to bottom). The seam can now
be corrected easily using an airbrush.
To roll the canvas
- Select Canvas > Roll and
select one of the following menu items:
- 50, 25
horizontal
-
Roll the canvas from
left to right a distance 50% or 25% of the width of the canvas.
- -25% horizontal
-
Roll the canvas from
right to left a distance 25% of width of the canvas.
- 50, 25 vertical
-
Roll the canvas from
bottom to top a distance 50% or 25% of the height of the canvas.
- -25% vertical
-
Roll the canvas from
top to bottom a distance 25% of the height of the canvas.
