[Ace commander]

I want the buildings to smoke for a while when destroyed. How files should i edit and how?

[beng]

Which buildings? Civilian building rubble already smokes constantly when destroyed.

[IraqiPeopleRocks]

If you're talking about the faction buildings, Use/Add the KeepObjectDie module to it.

[Ace commander]

I want smoke to rise up from all buildings. I want it to be a long black smoke that reaches the top of the screenand that will fade after a while. Do you know how?

[n5p29]

I don't know how to make a smoke to the top of the screen, but maybe this can make the building smoked a while when destroyed: Make the smoke particle effect (or use the existing one), put slowdeath behavior to the building, make DYING condition (not RUBBLE) in the building's draw module, add the smoke effect to that condition. It's worked like infantry's death animation.

[beng]

See gamedata.ini from "AutoFireParticleSmallPrefix" onwards. Rubble models have FireSXX SmokeSXX etc bones where XX is a number and the letter after the fire or smoke says the size (Small Medium Large).

You can edit gamedata.ini and change the particle system to bigger smokes like SootySmokeColumn02, or make your own:
ini editing discoveries and tips for Generals & ZH - CnCMaps Map Editing Forums

If you make your own, give them DUST_TRAIL priority, which is down the priority list, so your computer won't render them if it bogs down too much. If you really want it to render even if it slows things down, use a higher priority (see the link at the bottom of the post in the link above).

And for the building object, do like IPR says and use keepobjectdie instead of any other death behavior (no slow death or instant, no destroy die) so the rubble stays, and make sure your rubble model has those special bone names for auto fire and smoke.

[n5p29]

The reason why I use slow death: keepobjectdie will make the building's rubble will shown forever until it cleared by build. I think slow death suits better for faction buildings that buildable. It will sink slowly and smoked until totally disappeared.

[Ace commander]

thanks, this will make the buildings look more realistic when destroyed