46] Lighting oddities, By Gregory Denby.
Darkons
In a scanline render, shaped lights may have a negative intensity. This effect has been dubbed "darkons". For example, if a rectangular light with RGB values of -255, -255, 0 is pointed at an area also lit by a 255, 255, 255 light, the viewer will percieve only blue at that area. Although clumsy to use, darkons can simulate round and rectangular shadows in scanline renders. One might place a parallel "darkon" light under a chair, for instance, to subtract the light otherwise present to fake a shadow (negative lights may be defined only via detail editor).
Colored Haloes
Diminish intesity lights shine with an absolute brightness for the number of units assigned in their intensity requester. Because the light is divided into red, green, and blue components, uneven use of these colors can produce "haloes". An instance of this would be a 255, 200, 64 light. If placed near a surface, the first 64 units from the axis would be white, the next 64 a brilliant orange, and the next 128 a pinkish orange. The light would then fade away as a pale orange, shading with distance to a darker and darker red.
![[Contents]](main.gif)
![[Previous]](prev.gif)
![[Next]](next.gif)
Pages made from the amigaguide version with the help of Mike's
RDAG2HTML
and the fabulous Dietmar's GoldED with the
WWW extension v2.
![[email Ernie]](mail.gif)