The Tips in detail

 "How to do a holographic material in Max 2.5."

Here's a cheap little trick that can probably handle the color change.

You'll need blur' Shellac, Sidefade and Color Correct.

Start off with a shellac material with a base standard metal material, dark diffuse, very shiny and an optional raytrace reflection (just a bit, if you can afford the rendering times).

For the shellac layer, add another standard metal material with shininess 60 + and full shin strenght. For its diffuse map, make it RGB multiply with the (bit)map of your choice on slot 1. Color Correct on slot 2. In the advanced area of CC set the hue gain value higher than 360 and on the slot next to it, add sidefade. Go back to shellac and adjust the blend value. Give it a hundred for a start.

Please feel free to improvise. Roy Constantino (roy_c@d4.dion.ne.jp)

Just for bonus value; you can get a full holographic effect (a 3D picture, not just the iridescence) if you don't mind a little extra raytracing.

Suspend an object in front of the hologram (a cute little dove, for instance), lit with its own lights and excluded from the rest of the scene's lights. Place a sheet of thoroughly tansparent Raytrace material between the object and the camera, so it obscures the object from direct view. Exclude the object from the Raytrace material's refractions. In the first slot of Roy's RGB Multiply, place a Raytrace map, set to reflection, and including _only_ the object. When rendered, the sheet of Raytrace material will hide the object from the camera, but it will still appear as a ghostly rainbow-coloured reflection in the hologram material.

If you happen to have Raygun, you can forgo the masking sheet and simply use "reflect=only" in the object's user-defined properties. Alex McLeod (robot_messiah@geocities.com)