diff --git a/Aquaria/TileMgr.cpp b/Aquaria/TileMgr.cpp
index bca3ba5..1f88954 100644
--- a/Aquaria/TileMgr.cpp
+++ b/Aquaria/TileMgr.cpp
@@ -100,9 +100,10 @@ void TileMgr::doTileInteraction(const Vector& pos, const Vector& vel, float mult
 
 TileData* TileMgr::createOneTile(unsigned tilesetID, unsigned layer, float x, float y, ElementFlag ef, int effidx)
 {
-	TileData *t = _createTile(tilesetID, layer, x, y, ef, effidx);
+	TileData *t = _createTile(tilesetID, layer, x, y, ef);
 	if(t)
 	{
+		tileEffects.assignEffect(*t, effidx);
 		TileStorage& ts = tilestore[layer];
 		ts.refreshAll();
 	}
@@ -115,7 +116,7 @@ void TileMgr::createTiles(const TileDef* defs, size_t n)
 	for(size_t i = 0; i < n; ++i)
 	{
 		const TileDef& d = defs[i];
-		TileData *t = _createTile(d.idx, d.layer, d.x, d.y, (ElementFlag)d.ef, d.efxIdx);
+		TileData *t = _createTile(d.idx, d.layer, d.x, d.y, (ElementFlag)d.ef);
 		if(t)
 		{
 			used[d.layer] = 1;
@@ -130,9 +131,10 @@ void TileMgr::createTiles(const TileDef* defs, size_t n)
 			t->scalex = d.sx;
 			t->scaley = d.sy;
 
-			// must be done last
 			if(d.repeat)
 				t->setRepeatOn(d.rsx, d.rsy);
+
+			tileEffects.assignEffect(*t, d.efxIdx);
 		}
 	}
 
@@ -175,7 +177,7 @@ void TileMgr::exportGridFillers(std::vector<GridFiller>& fillers) const
 	}
 }
 
-TileData* TileMgr::_createTile(unsigned tilesetID, unsigned layer,  float x, float y, ElementFlag ef, int effidx)
+TileData* TileMgr::_createTile(unsigned tilesetID, unsigned layer,  float x, float y, ElementFlag ef)
 {
 	if(layer >= Countof(tilestore))
 		return NULL;
@@ -186,14 +188,11 @@ TileData* TileMgr::_createTile(unsigned tilesetID, unsigned layer,  float x, flo
 	t.rotation = 0;
 	t.scalex = 1;
 	t.scaley = 1;
-	//t.beforeScaleOffsetX = 0;
-	//t.beforeScaleOffsetY = 0;
 	t.flags = GetTileFlags(ef);
 	t.tag = 0;
 	t.rep = NULL;
 	t.et = tileset.getByIdx(tilesetID);
 	assert(t.et);
-	/* t.eff = */ tileEffects.assignEffect(t, effidx);
 
 	TileStorage& ts = tilestore[layer];
 	ts.tiles.push_back(t);
diff --git a/Aquaria/TileMgr.h b/Aquaria/TileMgr.h
index 58bfaa6..f13ddcd 100644
--- a/Aquaria/TileMgr.h
+++ b/Aquaria/TileMgr.h
@@ -76,7 +76,7 @@ public:
 	static ElementFlag GetElementFlag(TileFlags tf);
 
 private:
-	TileData *_createTile(unsigned tilesetID, unsigned layer, float x, float y, ElementFlag ef = EF_NONE, int effidx = -1);
+	TileData *_createTile(unsigned tilesetID, unsigned layer, float x, float y, ElementFlag ef = EF_NONE);
 
 	TileMgr(const TileMgr&); // no-copy
 };
diff --git a/BBGE/Tile.cpp b/BBGE/Tile.cpp
index 29f0f3e..add8367 100644
--- a/BBGE/Tile.cpp
+++ b/BBGE/Tile.cpp
@@ -333,10 +333,25 @@ TileEffectData::TileEffectData(const TileEffectConfig& cfg, const TileData *t)
 	}
 }
 
-TileEffectData::~TileEffectData()
+TileEffectData::TileEffectData(const TileEffectData& o)
+	: efxtype(o.efxtype), efxidx(o.efxidx), grid(NULL)
+	, alpha(o.alpha), blend(o.blend)
+	, ownGrid(false), shared(false), wavy(o.wavy)
+{
+}
+
+void TileEffectData::deleteGrid()
 {
 	if(ownGrid)
+	{
+		ownGrid = false;
 		delete grid;
+	}
+}
+
+TileEffectData::~TileEffectData()
+{
+	deleteGrid();
 }
 
 DynamicRenderGrid *TileEffectData::_ensureGrid(size_t w, size_t h, const TileData *t)
@@ -351,10 +366,8 @@ DynamicRenderGrid *TileEffectData::_ensureGrid(size_t w, size_t h, const TileDat
 	if(t && t->rep)
 	{
 		assert(!shared); // a shared instance MUST have its own grid and MUST NOT refer to the grid of any tile
-		if(ownGrid)
-			delete g;
+		deleteGrid();
 		g = &t->rep->grid;
-		ownGrid = false;
 	}
 
 	if(!g)
@@ -613,7 +626,7 @@ TexCoordBox TileRepeatData::calcTexCoords(const TileData& t) const
 	tc.u2 = (et.w*t.scalex*texscaleX)/tw + texOffX;
 	tc.v2 = (et.h*t.scaley*texscaleY)/th + texOffY;
 
-	// HACK: partially repeated textures have a weird Y axis. assuming a repeat factor of 0.5,
+	// HACK: partially repeated textures have a weird Y axis. assuming a repeat factor of 0.4,
 	// instead of texcoords from 0 -> 0.4 everything is biased towards the opposite end, ie. 0.6 -> 1.
 	// This is especially true for partial repeats, we always need to bias towards the other end.
 	// I have no idea why this has to be like this for tiles, but this is NOT the case for fonts.
@@ -658,7 +671,24 @@ TileRepeatData* TileData::setRepeatOn(float texscalex, float texscaley, float of
 	rep->texOffY = offy;
 	rep->refresh(*this);
 
-	// FIXME: if eff, link eff->grid to rep->grid
+	// link eff->grid to rep->grid. create own instance if necessary.
+	/*if(eff)
+	{
+		const unsigned char gridtype = eff->grid ? eff->grid->gridType : GRID_UNDEFINED;
+		if(flags & TILEFLAG_OWN_EFFDATA)
+		{
+			assert(!eff->shared);
+			eff->deleteGrid();
+		}
+		else
+		{
+			eff = new TileEffectData(*eff);
+			flags |= TILEFLAG_OWN_EFFDATA;
+		}
+		assert(!eff->ownGrid);
+		eff->grid = &rep->grid;
+		eff->grid->gridType = gridtype;
+	}*/
 
 	return rep;
 }
@@ -693,12 +723,12 @@ const TexCoordBox& TileData::getTexcoords() const
 
 const RenderGrid *TileData::getGrid() const
 {
+	if(eff && eff->grid)
+		return eff->grid; // this points to rep.grid if eff is present and repeat is on
+
 	if(flags & TILEFLAG_REPEAT)
 		return &rep->getGrid();
 
-	if(eff && eff->grid)
-		return eff->grid;
-
 	return et->grid;
 }
 
diff --git a/BBGE/Tile.h b/BBGE/Tile.h
index 80d7669..1d3a3de 100644
--- a/BBGE/Tile.h
+++ b/BBGE/Tile.h
@@ -112,10 +112,13 @@ enum TileFlags
 
 struct TileEffectData
 {
+	friend struct TileData;
+
 	TileEffectData(const TileEffectConfig& cfg, const TileData *t); // NULL is passed in during global prepare, when we don't have a tile
 	~TileEffectData();
 	void update(float dt, const TileData *t); // optional t needed for EFX_WAVY
 	void doInteraction(const TileData& t, const Vector& pos, const Vector& vel, float mult, float touchWidth);
+	void deleteGrid();
 
 	const EFXType efxtype;
 	const unsigned efxidx; // index of TileEffect
@@ -138,8 +141,8 @@ struct TileEffectData
 	Wavy wavy;
 
 private:
+	TileEffectData(const TileEffectData&); // internal use only
 	DynamicRenderGrid *_ensureGrid(size_t w, size_t h, const TileData *t);
-	TileEffectData(const TileEffectData&); // no-copy
 };
 
 struct TileRepeatData