btfx:firesmoke1_scr_tex
0x30000002 30 10 3
0 3 0 2
1 5 1   -2 4 -2
2.0 0.9   1.9 1   -0.001  0
0 1 0  0 1 0.5
0.1 0.1
 0.70  0.30  0.10   2.00    0.00 0.00 0.00 0.50
 0.50  0.20  0.00   1.00    0.00 0.00 0.00 0.50
-2.30 -1.10 -1.00   0.00    0.00 0.00 0.00 0.00
-2.00 -1.00 -0.60   0.00    0.00 0.00 0.00 0.00
0  0
6    2

format of psfx file is (NO BLANK LINES UNTIL END!)
%s texture
%d identifier %d maximum_issue %f release_period %f rate
%f px %f py %f pz %f pv
%f velx %f vely %f velz %f velxv %f velyv %f velzv
%f rad %f radv %f exp %f expv %f dexp %f dexpv
%f accelx %f accely %f accelz %f accelxv %f accelyv %f accelzv
%f atten %f attenv
%f sRi %f sGi %f sBi %f sAi %f sRiv %f sGiv %f sBiv %f sAiv
%f sRo %f sGo %f sBo %f sAo %f sRov %f sGov %f sBov %f sAov
%f eRi %f eGi %f eBi %f eAi %f eRiv %f eGiv %f eBiv %f eAiv
%f eRo %f eGo %f eBo %f eAo %f eRov %f eGov %f eBov %f eAov
%f color_warp %f alpha_warp
%f duration %f durationv

NOTE top  4 bits of identifier control immunity
     next 4 bits set 'do dots' if any bits are set
     see sparks.pfx for a dotty one