Howdy:
finally got around to going back to my effects files and do some more trials. So here's what I know about how to make AI aircraft emit smoke or water effects:
Technically, it's quite simple. In each aircraft.cfg the default effects settings look something like this:
[EFFECTS]
wake=fx_wake
water=fx_spray
dirt=fx_tchdrt
concrete=fx_sparks
touchdown=fx_tchdwn_s, 1
I tried many different combinations and it seems that for AI the two important settings are "concrete" and "touchdown" (whereas the first three keys don't seem to have any effect at all). Both trigger an effect at touchdown, with the difference that the "touchdown" key seems to require those kinds of effects that only run once, such as the standard 'rubber on tarmac' effect. If one chooses an effect that does not have a scripted ending it will stay on, even with the "1" flag (i.e., run once) set.
The tricky part is to find out which effect works well in general (some smoke effects completely envelop the aircraft when parked) and for which aircraft. Since smoke and exhaust effects are usually placed with the coordinate parameters in the [smokesystem] section they are often coded as a single trail. That works well on something like the single-engine Hawk 51 or even the Tomcat but will look strange on a 707 or 747. It often pays to hunt in your effects folder for aircraft-specific effects. For example, the white 'smoke' of the AI Dash-7 came with the original aircraft and seems to work fine (that image is an example of the engine-off effect visuals).
It is quite likely that, with a bit of help from the Effects SDK documents, one should be able to program aircraft-specific (e.g., 4-engine) exhaust effects for various AI.
Again, these effects will only get triggered on completion of the first flight. You don't have to be at that particular airport but it works only for AI in the active zone around your aircraft. Also, any reloading (with time change) will reset the AI and you'll lose the active effects.
I haven't tried these effects in FS9 yet but it looks like the effects engine hasn't changed.
A final note: other than the funny ground effects during parking you'll have to keep in mind that effects are frame rate eaters; if you have many AI with effects running you better have a fast rig - I don't ;-(
For the three examples in the images, here are the two parameters in each aircraft.cfg file:
Hawk51 (by KARI VIRTANEN and MIKKO MALINIEMI)
concrete=fx_dustcloud_s, 1
touchdown=fx_smoke_rx
F-14b Tomcat VF-154 CFG GMax (by Jeff Dobbing)
concrete=fx_sparks
touchdown=fx_smoke_w_DH
De Havilland Dash 7-100 (by Milton Shupe)
concrete=fx_tchdwn, 1
touchdown=D7rfxa
So, anyone who's interested, dive into your effects folder and go wild; you can trigger water effects on land, sparks in the water, or fireworks and bombs. It's quite fun to experiment with this...
Cheers, Holger


