I'm trying to create an environment that has little motes of dust floating off in the distance, just to give the user a background when the camera changes perspective.
To that end I made a particle system using the Stars template, and tweaked it a bit. The emitter is a sphere, the particles start on the surface and shoot off in random directions. The template includes a little round dot of a PNG image.
Unfortunately, the particles get very small if the camera is too far away. I want to put them well out in the distance, so particles can be behind the camera, but they basically disappear.
• Is there any way to specify a minium on-screen size? I don't want to just make them bigger if I can avoid it.
• The animation is much faster in the Xcode editor than it ends up being in my (currently trivial) SCNView. Any ideas why?
• I've set a Color and Color Variation in the Image section of the particle system properties, but the color set seems to affect the background shown in the Xcode editor.
Thanks.
