Shadow Map

Realsoft Graphics Oy		Shadow Map
	VSL Objects

Shadow map object is the same object which the render engine uses for mapped shadows. Render engine generates the required maps automatically as a part of the rendering process. With this object, you can do the same 'manually'. For example:

Create a camera that matches the beam of a spot light
Render an image file (preferably using Realsoft 3D's native multi channel format) that contains transparency and distance channels
Map the image to a light source using the Shadow Map shader and a pyramid mapping which matches the camera geometry

Shadow Map has the following controls:

File defines the name of the shadow map file.
Smooth defines how much smoothing is applied to the shadow map. The value defines the proportion smoothing width/image width, so quite small values (0.01 - 0.1) usually suffice.
Bindings/Transparency channel selects the image channel from which shadow transparency is read.
Bindings/Distance channel selects the image channel which defines nearest shadow distance for each map pixel.


Shader		Specular