TITLE: german "Spart Energie!" english (hopefully) "Conserve Energy!" NAME: Stefan Busch COUNTRY: Germany EMAIL: sbusch@tonet1.physik.tu-berlin.de WEBPAGE: none TOPIC: Glass COPYRIGHT: I SUBMIT TO THE STANDARD RAYTRACING COMPETITION COPYRIGHT. JPGFILE: bulb.jpg ZIPFILE: bulb.zip RENDERER USED: Povray 3.01 TOOLS USED: Designer (only for the imagemap of the bulb) RENDER TIME: 2 hours 19 minutes HARDWARE USED: Pentium-90 / 32MB running WIN95 IMAGE DESCRIPTION: FIRST: sorry for my bad English! Playing with POV I found lightsources mostly interesting. On the other hand I work on diffractive optics. Nearly everything in optics is made of glass. Putting it all together I created an image including both, light and glass. The posted scene is only the result of phantasy not the attempt of showing an existing lightbulb. In addition my lightbulb does not consummate any energy - no wires are attatched to the socket. DESCRIPTION OF HOW THIS IMAGE WAS CREATED: The central part of interest was the lightbult itselves. It consist of a CSG difference of two bulbobjects. The two bulbs are of the same shape and the inner one is scaled to get a bit smaller then the outer one. The standart glasstexture is slightly modified. In addition the outer bulbobject holds an imagemap containing the textobject 'OSRAM'. The basic object was created using DESIGNER 4.0 and exported as a GIF picture. Both files are included in the ZIP file. The socket is a thick screw. The screw consists of fifteen quadtori with spheres on the ends merged together as a union CSG. The resulting shape is not exactly a screw but from a distance it does the job. The lightsource is nothing more then a lookslike object. Three cylinder and four sphere objects form the basic geometry an hold an arealightsource rastered 5x5. This serves as a simple approximation for the glowing helix wire. Actually I didn't know a good and simple way to create a helix.