SXP shimmering
With R3, we added additional IPAS API calls for getting the 3D textured pixel
data (in perspective), so you could do additional filtering based on distance
from the camera. Unfortunately, the only sxp that actually takes advantage of
this is stucco.sxp, and even that is only rudimentary, compared to even more
elegant filtering methods (which are possible using these API calls). Due to a
lack of resources, we've just never been able to find the time to update all
those sxp's. There IS a workaround, however. You can render the sxp on a flat
plane, and then save that plane as an animated texture map. Map THAT onto an
object, and it'll go through all the same filtering that any bitmap texture
uses.
– G