For increased bombing affects in missions, there are a whole variety of facilities, such as ETO_City_target_1_fs.xml, ETO_City_target_1_fsPLUS.xml, etc., all of which contain buildings like acc_city_block_1a_fs, and others. Now the 'fs' suffix is and indication of enhanced damage affects in the building xdp file. For example.

facility ETO_City_target_1a_b_fs.xml is

<Facility Type="" Flags="isMilitary" OuterDistance="20000">
<Units>
<Unit Type="acc_city_block_1a_fs" Position="150.00 -150.00" Angle="0" />
<Unit Type="acc_city_block_3a_fs" Position="450.00 -150.00" Angle="0" />
<Unit Type="acc_city_block_2a_fs" Position="750.00 -150.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="1050.00 -150.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="1350.00 -150.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-150.00 -150.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-450.00 -150.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-750.00 -150.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1050.00 -150.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-1350.00 -150.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="150.00 150.00" Angle="0" />
<Unit Type="acc_city_block_3a_fs" Position="450.00 150.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="750.00 150.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="1050.00 150.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="1350.00 150.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-150.00 150.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-450.00 150.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-750.00 150.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1050.00 150.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1350.00 150.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="150.00 450.00" Angle="0" />
<Unit Type="acc_city_block_4a_fs" Position="450.00 450.00" Angle="0" />
<Unit Type="acc_city_block_2a_fs" Position="750.00 450.00" Angle="0" />
<Unit Type="acc_city_block_2a" Position="1050.00 450.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="1350.00 450.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-150.00 450.00" Angle="0" />
<Unit Type="acc_city_block_2a_fs" Position="-450.00 450.00" Angle="0" />
<Unit Type="acc_city_block_6a_fs" Position="-750.00 450.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1050.00 450.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-1350.00 450.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="150.00 750.00" Angle="0" />
<Unit Type="acc_city_block_2a_fs" Position="450.00 750.00" Angle="0" />
<Unit Type="acc_city_block_3a" Position="750.00 750.00" Angle="0" />
<Unit Type="acc_city_block_3a_fs" Position="1050.00 750.00" Angle="0" />
<Unit Type="acc_city_block_3a_fs" Position="1350.00 750.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-150.00 750.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-450.00 750.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-750.00 750.00" Angle="0" />
<Unit Type="acc_city_block_5a_fs" Position="-1050.00 750.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-1350.00 750.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="150.00 1050.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="450.00 1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="750.00 1050.00" Angle="0" />
<Unit Type="acc_city_block_4a_fs" Position="1050.00 1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="1350.00 1050.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-150.00 1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-450.00 1050.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-750.00 1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1050.00 1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1350.00 1050.00" Angle="0" />
<Unit Type="acc_city_block_5a_fs" Position="150.00 1350.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="450.00 1350.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="750.00 1350.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="1050.00 1350.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="1350.00 1350.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-150.00 1350.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-450.00 1350.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-750.00 1350.00" Angle="0" />
<Unit Type="acc_city_block_5a_fs" Position="-1050.00 1350.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1350.00 1350.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="150.00 -450.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="450.00 -450.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="750.00 -450.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="1050.00 -450.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="1350.00 -450.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-150.00 -450.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-450.00 -450.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-750.00 -450.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1050.00 -450.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1350.00 -450.00" Angle="0" />
<Unit Type="acc_city_block_2a" Position="150.00 -750.00" Angle="0" />
<Unit Type="acc_city_block_2a_fs" Position="450.00 -750.00" Angle="0" />
<Unit Type="acc_city_block_2a_fs" Position="750.00 -750.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="1050.00 -750.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="1350.00 -750.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-150.00 -750.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-450.00 -750.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-750.00 -750.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1050.00 -750.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1350.00 -750.00" Angle="0" />
<Unit Type="acc_city_block_6a_fs" Position="150.00 -1050.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="450.00 -1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="750.00 -1050.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="1050.00 -1050.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="1350.00 -1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-150.00 -1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-450.00 -1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-750.00 -1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1050.00 -1050.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-1350.00 -1050.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="150.00 -1350.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="450.00 -1350.00" Angle="0" />
<Unit Type="acc_city_block_5a_fs" Position="750.00 -1350.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="1050.00 -1350.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="1350.00 -1350.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-150.00 -1350.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-450.00 -1350.00" Angle="0" />
<Unit Type="acc_city_block_1a_fs" Position="-750.00 -1350.00" Angle="0" />
<Unit Type="acc_city_block_4a_fs" Position="-1050.00 -1350.00" Angle="0" />
<Unit Type="acc_city_block_1a" Position="-1350.00 -1350.00" Angle="0" />
</Units>
<GroundPlanes>
<Plane Position="0.00 0.00" Angle="0" Size="3000 3000" />
</GroundPlanes>
<Routes />
</Facility>


and, say, building ACC_city_block_4a_fs has an xdp file
as

<?xml version="1.0"?>
<UnitData>
<General Worth="100" Hardness="2" LongName="" ShortName="school B" ModelName="ACC_city_block_4a_fs.m3d" BlastDamageScale="1.0" ImpactDamageScale="1.0" FireDamageScale="1.0" Priority="3" Type="static" EnteredService="01/01/1930" BlastDamageMod="1" ImpactDamageMod="1" FireDamageMod="1" Category="structure" Country="neutral" AllowSpawn="n"/>
<Description String=""/>
<Loadouts/>
<GunStations/>
<DamageBoxes>
<Box ID="damagebox_nose" Parent="damagebox_nose">
<BoxMap SystemID="pilot" Probability="100" Points="5000"/>
</Box>
</DamageBoxes>
<Systems>
<System ID="pilot" Name="">
<Threshold Level="80" Effect="Break" Parameter="" Location=""/>
<Threshold Level="80" Effect="Library" Parameter="fx_struct_rubble_l" Location=""/>
<Threshold Level="80" Effect="Break" Parameter="" Location=""/>
<Effect Type="Track" EffectName="fx_D_fire_sml" PosX="0" PosZ="0" PosY="0.0" MinVel="-1" MaxVel="100" />
<Threshold Level="80" Effect="Library" Parameter="fx_bldgsmk_m" Location=""/>
<Threshold Level="90" Effect="Library" Parameter="fx_gasfire_m" Location=""/>
<Threshold Level="100" Effect="Library" Parameter="fx_smk_plume_m" Location=""/>
<Threshold Level="100" Effect="Library" Parameter="fx_struct_rubble_m" Location=""/>
<Threshold Level="100" Effect="Break" Parameter="" Location=""/>
<Threshold Level="1" Effect="Library" Parameter="Smoke_Burst_Small_1" Location=""/>
<Threshold Level="30" Effect="Library" Parameter="sparkhit_g_medium" Location=""/>
<Threshold Level="30" Effect="Library" Parameter="fx_gasfire_l" Location=""/>
<Threshold Level="50" Effect="Library" Parameter="Smoke_Burst_Small_3" Location=""/>
<Threshold Level="50" Effect="Library" Parameter="fx_Vehicle_Smoke_damage2" Location=""/>
<Threshold Level="50" Effect="Library" Parameter="fx_struct_damage_l" Location=""/>
<Threshold Level="50" Effect="Break" Parameter="" Location=""/>
<Threshold Level="80" Effect="Library" Parameter="Air_explosion_LRG_static_fire_SG" Location=""/>
<Threshold Level="80" Effect="Library" Parameter="Air_Explosion_LRG_static_smoke_SG_Black " Location=""/>
<Threshold Level="80" Effect="Library" Parameter="G_Smoke_train_damage3" Location=""/>
<Threshold Level="80" Effect="Library" Parameter="fx_struct_rubble_l" Location=""/>
<Threshold Level="80" Effect="Library" Parameter="fx_fireball_l" Location=""/>
<Threshold Level="80" Effect="Break" Parameter="" Location=""/>
<Threshold Level="100" Effect="Library" Parameter="Air_explosion_LRG_static_fire_SG" Location=""/>
<Threshold Level="100" Effect="Library" Parameter="Air_Explosion_LRG_static_smoke_SG_Black " Location=""/>
<Threshold Level="100" Effect="Break" Parameter="" Location=""/>
<Threshold Level="100" Effect="Library" Parameter="fx_eto_firebomb" Location=""/>
</System>
</Systems>
</UnitData>

It also has a m3d file with city block dds content, but I am assuming that is not relevant ()

The problem is thast on bombing, especially with incendiaries, I am getting squiggly or flashing lined sppeasring from the bombing, as below. Any (expert) one have any ideas on this?