You can select a bitmap
map to use as a reflection map.
You can create three
kinds of reflection: basic reflection maps, automatic reflection
- A basic reflection map creates the illusion
of chrome, glass, or metal by applying a map to the geometry so
that the image looks like a reflection on the surface.
- An automatic reflection map uses no mapping
at all, but looks outward from the center of the object, and maps
what it sees onto the surface.
Another way to generate
reflections automatically is to assign a
Raytrace map to
be the reflection map.
- A flat-mirror reflection map is applied
to a series of coplanar faces and reflects objects facing it, exactly
like a real mirror.
Reflection maps don't
coordinates because they're locked to
the world, not to the geometry. The illusion of a reflection is
created because the map doesn't move with the object, but with changes
in the view, as do real reflections.
The most common use of
reflection maps in a realistic scene is to add just a touch of reflection
to an otherwise non-reflective surface. By default, reflection map
strength is 100 percent, as it is for other maps. For many kinds
of surfaces, however, reducing the strength gives the most realistic
result. A polished table top, for example, primarily shows a wood
grain; the reflections are secondary.
Reflection maps look
more realistic if you increase the Glossiness and Specular Level
values in the
Parameters rollout. They are also affected
values. The darker the color, the stronger the mirror effect.
Even when the Amount
spinner is at 100, the reflection map is tinted by the ambient,
In metal materials, the
Diffuse color tints the reflection map. Specifically, the color
from the reflection map is multiplied by the diffuse color (including
a diffuse map, if one exists). The value (in the
of the diffuse color controls the reflection map intensity. If the
diffuse color value is 255, the reflection is at full intensity;
if the value is 0, the map is not visible.
In non-metal materials,
the Specular color multiplies only reflection maps. The value (in
of the specular color affects the reflection intensity. If the specular
color value is 255, the reflection is at full intensity; if the
value is 0, the map is not visible.
To create an automatic reflection:
- On the Maps rollout, click the Map button
- In the
Browser, choose the Reflect/Refract map
type, and then click OK.
Adjusting the map's Strength
slider in the parent material's Maps rollout controls how reflective
the material is. At 100 percent, the material is fully reflective.
To assign a bitmap as a reflection map:
- In the Maps rollout, click the Map button
labeled Reflection. In the
Browser, double-click Bitmap.
- In the Bitmap Parameters rollout, click
the Bitmap button.
- Use the file dialog to choose the bitmap
- Reduce the Reflection map's Amount to
get the effect you want.
Refractions are similar
to reflections. Bitmaps simulate reflections, while Reflect/Refract
maps generate them based on the scene's background and geometry.