8

1442 Chapter 16: Material Editor, Materials, and Maps
See also
For funct ionalit y shared with other 2D maps, see
the following topics:
Coordinates Rollout (2D) (page 2–1434)
Noise Rollout (2D) (page 2–1439)
Output Rollout (page 2–1430)
Pr ocedur es
To crop an image:
1.
On the Bitmap Parameters rollout, click the
Bitmapbuttonandassignabitmap.
2. In the Cropping/Placement group, turn on
Apply to see the results of cropping in the
sample slot (and in shaded viewports, if Show
Map In V iewport is active).
3. Turn on Crop.
4. ClickViewImagetodisplaythebitmap.
A frame window appears, displaying the image
surrounded by a region outline (a dashed line
at the outer edges of the image, with handles on
the sides and corners).
5. Specify a cropping region by adjusting the
spinnersatthetopofthewindow,orby
drag ging the region outline.
To place an image:
1.
On the Bitmap Parameters rollout, click the
Bitmapbuttonandassignabitmap.
2. In the Cropping/Placement group, turn on
Apply to see the results of cropping in the
sample slot (and in shaded viewports if Show
Map In V iewport is active).
3. Turn on Pla ce.
4. Click View Image.
A frame window appears, displaying the image
surrounded by a region outline (a dashed line
at the outer edges of the image, with handles on
the sides and corners).
5. Move the image by adjusting the spinners at the
top of the window, or by dragging the region
outline.
The reduced image "decals" on the sample
sphere. The diff use color is visible around the
image.
To use the a lpha channel that is part of the bitmap:
1.
On the Maps rollout, a ssign the map to the
Opacity component.
(Youcanassignacopyorinstanceofthismap
to other components, such as Diffuse, as well.)
2. Click the map button for the Opacity
component.
This lets you adjust the settings for the Opacity
map.
3. In the Bitmap Parameters rollout > Alpha
Source group, choose Image Alpha.
This option is not available if the bitmap does
not have an alpha channel.
4. In the Bitmap Parameters rollout > Mono
Channel Output group, choose Alpha.
This option is not available if the bitmap does
not have an alpha channel.
The bitmapped material will now have t he
transparency specified by the a lpha channel.
This w i ll appear in renderings. Transparency
does not appear in viewports or ActiveShade
renderings.
To create an alpha channel based on intensity:
• In Bitm ap Parameters rollout > Alpha Source
group, turn on RGB Intensit y.
Thesoftwarecreatesanalphachannel.
Full-intensit y areas of the image are opaque,
zero-intensity areas are transparent, and