Sounds like you're missing resources from OOO perhaps so double check the install. For instance, do you get a meshes\armor\javbs folder after the install?
What do you mean with "using the OMOD of OOO v1.33"? 1.33 Complete comes OMOD ready (e.g. with OMOD conversion data) but not pre-packaged as an OMOD. Anyway, check the http://www.gamesas.com/index.php?/topic/1119240-relz-oscuros-oblivion-overhaul-133/ for download links/info. Also, post your load order, preferably via Wrye Bash but alternatively via OBMM.
I'm using the pre-package OOO_133_Complete.7z (totalling 402mb before conversion) converted to OMOD via OBMM. After conversion it is Oscuro's Oblivion Overhaul COMPLETE 1.33 in OBMMs mod folder totaling 396mb in size.
Here's my load order via OBMM.
Oblivion.esm
Oscuro's_Oblivion_Overhaul.esm
HrmnsOblivionScriptOptimizationv1.0.esp
Unofficial Oblivion Patch.esp
Unofficial Shivering Isles Patch.esp
UOP Vampire Aging & Face Fix.esp
Oblivion Citadel Door Fix.esp
DLCHorseArmor.esp
DLCHorseArmor - Unofficial Patch.esp
DLCOrrery.esp
DLCOrrery - Unofficial Patch.esp
DLCMehrunesRazor.esp
DLCMehrunesRazor - Unofficial Patch.esp
DLCVileLair.esp
DLCVileLair - Unofficial Patch.esp
DLCSpellTomes.esp
DLCSpellTomes - Unofficial Patch.esp
Expanded Hotkeys and Spell Delete v1.0.esp
Vampirism.esp
SpreadingVampirism.esp
Living Economy.esp
Living Economy - Items.esp
Oscuro's_Oblivion_Overhaul.esp
OOO-Water_Weeds.esp
OOO-Level_Stock.esp
Harvest [Flora].esp
Harvest [Flora] - Shivering Isles.esp
Harvest [Flora] - DLCVileLair.esp
RenGuardOverhaul.esp
Knights.esp
Knights - Unofficial Patch.esp
DLCFrostcrag.esp
DLCFrostcrag - Unofficial Patch.esp
DLCThievesDen.esp
DLCThievesDen - Unofficial Patch.esp
DLCThievesDen - Unofficial Patch - SSSB.esp
DLCBattlehornCastle.esp
DLCBattlehornCastle - Unofficial Patch.esp
ScriptEffectSubduer.esp
-No-_persistant_enchantment_glow_fix-1843.esp
my meshes/armor folder has something like 116 subfolders in it atm including javbs