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- This is a 24 bit repeatable brush map for Imagine Version 1.1, and for any
- other renderer that uses repeated tilings of color and transparency maps.
- There are two 64 by 64 IFF24 pictures, named
-
- lattice_color.rbm24 (Repeatable Brush Map, 24 bits)
- lattice_filter.rbm24
-
- To use these maps, make a flat plane (two triangles is all you need!)
- and map the lattice_color map onto it with flat x and flat z. Select
- "repeat" to make the plane become tiled. Make sure the Y axis of the brush
- passes through the plane, like this cheesy diagram.
-
- ^ Y axis (Top view)
- |
- |
- | plane
- ---+-------------you're
- | tiling (edge-on)
- |
- |
- +-------> X axis
-
- Size and place the X and Z axes of the brush to cover any part of the
- plane, and for your first try, make the brush about 1/20th the size of
- the plane. Use L (local) mode to scale the brush, or your changes might
- not stick.
-
- Render! You should see a very nice greyish rose trellis instead of a blank
- plane. Play around with the size of the brush map until the scale is right
- for your scene. You can also play with camera views... you can zoom in
- VERY close without much realism loss.
-
- Once you're satisfied with the placement of the trellis, go back to the
- detail editor and edit the first brush map. Select "Transform Axes" and click
- on "Size", "Alignment", and "Position", and write down the 9 numbers it
- prints for x, y, and z. These numbers represent the EXACT location and
- position of your brush map. Select "cancel" when you're done, since you
- don't really want to change anything.
-
- Add a second brush map, the lattice_filter one. This tells Imagine where the
- lattice should be transparent (the holes between the slats) as well as where
- the edges are so they're blurred into the background instead of a harsh cutoff.
- Select Flat X, Flat Z, repeating, and FILTER map (not color!) Go to "transform
- axes" and select size, alignment, and position, entering the numbers from the
- first map. Select "ok" and go back and check it has the right numbers. They
- should match exactly.
-
- The two maps are now perfectly registered, so you should see holes where
- there are holes. Put something behind your new trellis and render again...
- cool, huh?
-
- You probably want to turn the specular attribute to 0 0 0, or else you'll
- get highlights from the holes as well as the slats of the trellis. (It looks
- like a rose trellis encased in glass.. kinda neat!) Similarly, you probably
- want no reflection, or shininess. Index or refraction should probably be
- at 1.00. Color and filter attributes are all supersceded by the brush maps,
- but I usually turn color to black and filter to full white for safety.
-
-
- This file and the brush maps are freely distributable as long as this text
- file accompanies them. If you use them in a scene or application application,
- please give me credit, but you need no permission from me to use them
- any way you like.
-
- Drop me a note if you've done something neat, need help, or have ideas
- of your own.
-
-
- -Steve Worley
-
- -------------------------------------------------------------------------------
- Steve Worley spworley@athena.mit.edu
- -------------------------------------------------------------------------------
-