Light Filter Test

First tip - you can still change parameter values and click on the image while this tips window is open.

When you apply a light filter to an image, the image intitally goes black. You can then light it with cones, points (see elsewhere) and ambient lights.

Ambient lights cover the whole image and are great for night-from-day effects - try clicking the 'Switch Filters Off' button to see what the image looks like without filters.

Try moving the target location nearer and further from the source (just click on the image) - the 'strength' parameter defines the light intensity at the target, so the further the target is from the source, the longer the beam of intense light.

To change the source location of an image, either type in its coordiates, or hold down [Shift] and click the mouse button. This may result in some the text on the page becoming selected - juse click anywhere outside the image to clear it.

Try typing negative values into the position parameters - you can place the light's source and target off the picture.

The cone's Source Zpos parameter controls how far 'in front of' the image the light source is supposed to be - the higher the value, them more it's as if you're shining a torch directly at the image.

Widening the Spread Angle does what you'd think - makes the beam wider.

Change any of the parameters in the ambient and cone tables, then click outside the table to see the effect. You can also change the cone's target coordinates by clicking on the image, and its source x,y coordinates by Shift-clicking. Below are the script statements to generate the filters as you currently see them.

Cone Light Parameters
Source X pos	Source Ypos	Source Zpos	Target Xpos	Target Ypos	Red (0-255)	Green (0-255)	Blue (0-255)	Strength (0-100)	Spread Angle (0-90 degrees)

Ambient Light Parameters
Red	Green	Blue	Strength