The IESDP has finally been updated again. Updates include (but are not limitied to):

Action + triggers updates + typo's (inc. SetSaveLocation & MoveToSaveLocation)
BG1 songlist (ie formats -> mus)
Common state.ids shortcuts
IWD: TotL IDS
Corrected kit.ids
CLUA updates (BG2, IWD2)
Minor updates to .dat files
File formats:
are file updates (actor flags)
cre file updates (PS:T XP fields)
cre file 2.2 added
pro file updates (minor)
sto file updates (quality bits)
vvc file updates (3rd anim sequence)
wfx file updates
wmp file updates (link entry)

There should be another update within a month or so, to add more information and misc updates.

Relevant Links
IESDP

this is for your next update: BGII overlay list

all overlay tis have a counterpart (WTFALL and WTFALLR) the 'R' is to show what it looks like when it rains, they can look the exactly the same but they must have 2 files


HOTCOAL.TIS -----this is a hot coal (charcoal) overlay
HOTCOALR.TIS

WT5000A.TIS -----this is a brown gray water overlay (saradush)
WT5000AR.TIS
WT5000B.TIS
WT5000BR.TIS
WT5000C.TIS
WT5000CR.TIS
WT5000D.TIS
WT5000DR.TIS

WTFALL.TIS -----this is a waterfall overlay
WTFALLR.TIS

WTGOO.TIS -----this is a mud overlay
WTGOOR.TIS
WTGOO2.TIS
WTGOO2R.TIS

WTLAKA.TIS ----this is a light blue lake overlay
WTLAKAR.TIS
WTLAKB.TIS
WTLAKBR.TIS
WTLAKC.TIS
WTLAKCR.TIS
WTLAKD.TIS
WTLAKDR.TIS
WTLAKE.TIS
WTLAKER.TIS

WTLAVA.TIS ----this is a lava overlay
WTLAVAR.TIS
WTLAVB.TIS
WTLAVBR.TIS
WTLAVC.TIS
WTLAVCR.TIS
WTLAVD.TIS
WTLAVDR.TIS

WTMGLI.TIS ----this is a purple water overlay
WTMGLIR.TIS

WTOIL.TIS ------this is an oil overlay
WTOILR.TIS
WTOIL2.TIS
WTOIL2R.TIS


WTPOOL.TIS ----this is a pale blue overlay
WTPOOLR.TIS

WTRIV.TIS ------this is a green blue overlay
WTRIVR.TIS

WTRIV2.TIS -----this is a darker blue overlay
WTRIV2R.TIS

WTSEW.TIS ------this is a sewer water (brown) overlay
WTSEWR.TIS
WTSEWB.TIS
WTSEWBR.TIS

WTSTR.TIS -------this is a dark blue (flat) overlay
WTSTRR.TIS

WTSTR2.TIS ------this is a lighter blue (flat) overlay
WTSTR2R.TIS

WTSWAM.TIS -----this is a ocean overlay
WTSWAMR.TIS

WTTURN.TIS ------this is a gray water overlay
WTTURNR.TIS

WTWAVE.TIS -----this is a blue (rocky botom) overlay
WTWAVER.TIS

This is bg1 area overlay list (note not all overlays may work)

HOTCOAL.TIS -----this is a hot coal (charcoal) overlay
HOTCOALR.TIS

WTFALL.TIS ------this is a waterfall overlay
WTFALLR.TIS

WTGOO.TIS -------this is a mud overlay
WTGOOR.TIS
WTGOO2.TIS
WTGOO2R.TIS

WTLAKE.TIS ------this is a light blue lake overlay
WTLAKER.TIS

WTLAVA.TIS ------this is a lava overlay
WTLAVAR.TIS
WTLAVA2.TIS
WTLAVA2R.TIS

WTMGLI.TIS ------this is a purple water overlay
WTMGLIR.TIS

WTOIL.TIS -------this is an oil overlay
WTOILR.TIS
WTOIL2.TIS
WTOIL2R.TIS

WTPOOL.TIS ------this is a pale blue overlay
WTPOOLR.TIS

WTRIV.TIS -------this is a green/blue river overlay
WTRIVR.TIS

WTRIV2.TIS ------this is a darker blue overlay
WTRIV2R.TIS

WTSEW.TIS -------this is a sewer water (brown) overlay
WTSEWR.TIS
WTSEWB.TIS
WTSEWBR.TIS

WTSTR.TIS -------this is a dark blue (flat) overlay
WTSTRR.TIS

WTSTR2.TIS ------this is a lighter blue (flat) overlay
WTSTR2R.TIS

WTSWAM.TIS ------this is a ocean overlay
WTSWAMR.TIS

WTTURN.TIS ------this is a gray water overlay
WTTURNR.TIS

WTWAVE.TIS ------this is a blue (rocky botom) overlay
WTWAVER.TIS

Could you add the number of tiles for each one? Most have 5 but some, like the lava tilesets, have more.