CompuServe Messages

Moving Clouds

    24-Jun-93 00:47:52
Sb: #47336-Moving Clouds
Fm: Don Landis 71673,3612
To: Larry Junda 70714,276
Here's a repeat: OK! It worked very well in still rendering. Here's what I've done to get the effect: I created an oversize box(larger than viewing area). Apply the Smoke IPAS as follows: Size: any number 1000 to 2000 works well Iterations: 2 or 3 Exponent: 1.5 Speed: 0.3 Color1: 10R188G233B Cyan background or sky blue Color2: L235, H&S 0 White puffy cloud color The still rendering looks as good as any of the clouds I captured on 35mm slides. Next I'll try the animation for exponent and speed settings to get a realistic cloud movement. The atmosphere settings didn't do anything for me but could be added for your own effect. Fog would be better if I could control its concentration at ground level but what does fog have to do with getting the realistic cloud look anyway? The horizon line didn't seem to be a problem as I once thought. To create a concentration of clouds at the horizon try to angle the skybox object and the ground box object as a very long < with the camera viewed into its opening Then fog might have some ground concentration too. I'm getting ideas as I type this response. Not too often does something like this fall into place so easily. Got to go now and try some of these thoughts. In the meantime I think you'd be safe in placing your order for the IPAS routine #2 for this project. The latest update on Moving clouds: Used the settings in my previous message to render a 300 frame flc. The look was very bad due to 8 bit color banding. (I wasn't surprised) movement was a little fast. Horizon concentration of the clouds was very realistic. Now on to Targa, The look was perfect, however still too fast on movement. It was a good storm brewing effect with the cloud colorset a little more gray. Putting the sky box object at an angle was the secret ingredient to creating the photo-realistic effect. ie. Very large white puffy clouds overhead and smaller more tightly packed clouds near the horizon. Need to slow down the speed more but with a lightning strike or two I think an artificial electrical storm could be made to look real. Hmmmm I wonder if plasma IPAS can be used some how???? Repeat courtesy of WINCIM Autofiled and clipboard <g>