Effects question

Hi folks,[Not sure if this is the right place for this post... if it should be somewhere different, the mods are most welcome to move it!]I have a question concerning effects files... I am trying to get a nice looking contrail for AI planes to use but the problem is that the available ones are either too broken and fluffy (in the case of 3D ones) or just plain flat and almost invisible when viewed from the same level. I thought a good compromise would be to take a flat style contrail and "double it up" with one copy at 90degrees to the other so as to give a 3D effect... a bit like with fs9 trees... In editing the effects I have come up with some issues... mostly to do with the two contrails "separating" from each other after some distance but I think overall I am getting somewhere with this.Questions:- I see the following line: Ground Normal=1 and I think this might be what is keeping it flat so I removed it from the rotated part - am I right?- To turn the effect through 90 degrees, is it right to be setting Z Rotation=90.00, 90.00 - fairly sure Z is the vector along the contrail? Why are there two values for the angle?The whole code is below - mostly a modification of a contrail effect from the library...Cheers,Geoff

[Library Effect]Lifetime=5Version=2.00[Emitter.0]Lifetime=0.00, 0.00Delay=0.30, 0.32Bounce=0.00Rate=1.00, 1.01X Emitter Velocity=0.00, 0.00Y Emitter Velocity=0.00, 0.00Z Emitter Velocity=0.00, 0.00Drag=0.00, 0.01X Particle Velocity=0.00, 0.00Y Particle Velocity=0.00, 0.00Z Particle Velocity=0.00, 0.00X Rotation=0.00, 0.00Y Rotation=0.00, 0.00Z Rotation=0.00, 0.00X Offset=0.00, 0.00Y Offset=0.00, 0.00Z Offset=-10.00, -10.00[Particle.0]Lifetime=360.0, 360.0Type=21X Scale=8.00, 8.00Y Scale=8.00, 8.00Z Scale=0.00, 0.00X Scale Rate=0.20, 0.20Y Scale Rate=0.20, 0.20Z Scale Rate=0.00, 0.00Drag=-999.00, -999.00Color Rate=0.00, 0.00X Offset=0.00, 0.00Y Offset=0.00, 0.00Z Offset=0.00, 0.00Fade In=0.10, 0.10Fade Out=0.75, 0.75Shade=1Face=0, 0, 0Ground Normal=1[ParticleAttributes.0]Blend Mode=1Texture=fx_smoke.bmpBounce=0.00Color Start=255, 255, 255, 200Color End=249, 249, 249, 255Jitter Distance=0.00Jitter Time=0.00uv1=0.00, 0.00uv2=1.00, 1.00X Scale Goal=300.00Y Scale Goal=300.00Z Scale Goal=0.00Extrude Length=200.00Extrude Pitch Max=20.00Extrude Heading Max=20.00[Emitter.1]Lifetime=0.00, 0.00Delay=0.30, 0.32Bounce=0.00Rate=1.00, 1.01X Emitter Velocity=0.00, 0.00Y Emitter Velocity=0.00, 0.00Z Emitter Velocity=0.00, 0.00Drag=0.00, 0.01X Particle Velocity=0.00, 0.00Y Particle Velocity=0.00, 0.00Z Particle Velocity=0.00, 0.00X Rotation=0.00, 0.00Y Rotation=0.00, 0.00Z Rotation=90.00, 90.00X Offset=0.00, 0.00Y Offset=0.00, 0.00Z Offset=-10.00, -10.00[Particle.1]Lifetime=360.0, 360.0Type=21X Scale=8.00, 8.00Y Scale=8.00, 8.00Z Scale=0.00, 0.00X Scale Rate=0.30, 0.30Y Scale Rate=0.30, 0.30Z Scale Rate=0.00, 0.00Drag=-999.00, -999.00Color Rate=0.00, 0.00X Offset=0.00, 0.00Y Offset=0.00, 0.00Z Offset=0.00, 0.00Fade In=0.10, 0.10Fade Out=0.75, 0.75Shade=1Face=0, 0, 0Ground Normal=1[ParticleAttributes.1]Blend Mode=1Texture=fx_smoke.bmpBounce=0.00Color Start=255, 255, 255, 200Color End=249, 249, 249, 255Jitter Distance=0.00Jitter Time=0.00uv1=0.00, 0.00uv2=1.00, 1.00X Scale Goal=300.00Y Scale Goal=300.00Z Scale Goal=0.00Extrude Length=200.00Extrude Pitch Max=20.00Extrude Heading Max=20.00