BGLHeader

TDFTerrainFileHeader

VTPFileHeader

VTP Data
	VTPDataArea
	VTPLayer
	VTPNumTextureInLayer
	VTPTextureID
	VTPPolyCount
		VTPPoly(VTPPolyMethod1 or VTPPolyMethod2)
		?
		?
		VTPPoly(VTPPolyMethod1 or VTPPolyMethod2)
		?
		?
	VTPDataArea
	VTPLayer
	VTPNumTextureInLayer
	VTPTextureID
	VTPPolyCount
		VTPPoly(VTPPolyMethod1 or VTPPolyMethod2)
		?
		?
		VTPPoly(VTPPolyMethod1 or VTPPolyMethod2)
		?
		?
	VTPDataArea
	    .
	    .
	    .
	    .
	    .


VTPIndexHeader

VTPIndexEntry
    .
    .
    .
    .
    .


VTPTextureListHeader

VTPTextureListEntry