This can be easily seen by using the "Edit Terrain Object" module in 3DEN :
Affected panelaks :
["panelak2.p3d","ca\buildings\panelak2.p3d",false]
["panelak3.p3d","ca\buildings\panelak3.p3d",false]
Respective ruin models :
["panelak2_ruins.p3d","ca\buildings\ruins\panelak2_ruins.p3d",false]
["panelak3_ruins.p3d","ca\buildings\ruins\panelak3_ruins.p3d",false]