btfx:firesmoke1_scr_tex
0x00000668 80 0.2 180
3.4 1.3 -4 1.25
2 1 -3   -4 -2 -3
0.5 1   0 0   -1	0.0
0 1 3  0 0.5 2
1 0
2.20 1.30 0.90  1.60    0.00 0.00 0.00 0.00
2.00 0.50 0.00  0.60    0.00 0.00 0.00 0.00
-0.10 -0.30 -1.0 -2    0.00 0.00 0.00	2.00
0.00 0.00 -1.00  -2   0.00 0.00 0.00 2.00
1 1
0.1		0.4

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