btfx:firesmoke1_scr_tex
0000670 25 4 10
0 0 0 1
2 2 2   -4 1 -4
0.25 0.25   .5 .5   0.00	0
0 1 0  0 1 0
0.5 0.5
0.30 0.30 0.30  1.10    0.00 0.00 0.00 0.00
0.30 0.30 0.30  1.00    0.00 0.00 0.00 0.00
-0.00 -0.00 -0.00  0.00    0.00 0.00 0.00	0.00
0.00 0.00 0.00  0.00    0.00 0.00 0.00 0.00
10  1
1.75		0.5

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