DieselSmokeEffectInitialMagnitude( 1 ) DieselSmokeEffectMaxMagnitude( 19 ) DieselSmokeEffectInitialSmokeRate( 1.5 ) DieselSmokeEffectMaxSmokeRate( 30 )
I've updated them and am now using
DieselSmokeEffectInitialMagnitude( 0.8 ) DieselSmokeEffectMaxMagnitude( 1.6 ) DieselSmokeEffectInitialSmokeRate( 0.5 ) DieselSmokeEffectMaxSmokeRate( 2.9 )
which look pretty normal.
For the visual effect in the screen shot I left the train brakes full on, moved the throttle to 4% for a moment or two to fill the air w/ grey smoke and then rapidly pushed the throttle up to 100% and then back down to 0. The increase put all the black into the original gray and then the decrease mixed gray back into the black. It's more spectacular up close but I wanted to share the overall effect here.