diff --git a/modules/game_npctrade/npctrade.lua b/modules/game_npctrade/npctrade.lua
index 454fc659..79bb83e6 100644
--- a/modules/game_npctrade/npctrade.lua
+++ b/modules/game_npctrade/npctrade.lua
@@ -210,10 +210,10 @@ local function onOpenNpcTrade(items)
     newItem.name = item[2]
     newItem.weight = item[3] / 100
 
-    if item[4] >= 0 then
+    if item[4] > 0 then
       newItem.price = item[4]
       table.insert(tradeItems[BUY], newItem)
-    elseif item[5] >= 0 then
+    elseif item[5] > 0 then
       newItem.price = item[5]
       table.insert(tradeItems[SELL], newItem)
     else
diff --git a/src/framework/CMakeLists.txt b/src/framework/CMakeLists.txt
index 7c796d64..46712e91 100644
--- a/src/framework/CMakeLists.txt
+++ b/src/framework/CMakeLists.txt
@@ -13,7 +13,7 @@ SET(BUILD_REVISION "custom" CACHE "Git revision string (intended for releases)"
 
 # set debug as default build type
 IF(NOT CMAKE_BUILD_TYPE)
-    SET(CMAKE_BUILD_TYPE RelWithDebInfo)
+    SET(CMAKE_BUILD_TYPE Debug)
 ENDIF()
 
 # setup compiler options
diff --git a/src/framework/graphics/image.cpp b/src/framework/graphics/image.cpp
index 547138ba..102a3529 100644
--- a/src/framework/graphics/image.cpp
+++ b/src/framework/graphics/image.cpp
@@ -83,3 +83,23 @@ void Image::overwriteMask(const Color& maskedColor, const Color& insideColor, co
         a = writeColor.a();
     }
 }
+
+void Image::append(const Point& dest, const ImagePtr& other)
+{
+    if(!other)
+        return;
+
+    uint8* otherPixels = other->getPixelData();
+    for(int p = 0; p < other->getPixelCount(); ++p) {
+        int x = p % other->getWidth();
+        int y = p / other->getWidth();
+        int pos = ((dest.y + y) * m_size.width() + (dest.x + x)) * 4;
+
+        if(otherPixels[p*4+3] == 0xFF) {
+            m_pixels[pos+0] = otherPixels[p*4+0];
+            m_pixels[pos+1] = otherPixels[p*4+1];
+            m_pixels[pos+2] = otherPixels[p*4+2];
+            m_pixels[pos+3] = otherPixels[p*4+3];
+        }
+    }
+}
diff --git a/src/framework/graphics/image.h b/src/framework/graphics/image.h
index 012f1df1..33a0655f 100644
--- a/src/framework/graphics/image.h
+++ b/src/framework/graphics/image.h
@@ -35,6 +35,7 @@ public:
     static ImagePtr loadPNG(const std::string& file);
 
     void overwriteMask(const Color& maskedColor, const Color& insideColor = Color::white, const Color& outsideColor = Color::alpha);
+    void append(const Point& dest, const ImagePtr &other);
 
     std::vector<uint8>& getPixels() { return m_pixels; }
     uint8* getPixelData() { return &m_pixels[0]; }
@@ -43,6 +44,7 @@ public:
     int getWidth() { return m_size.width(); }
     int getHeight() { return m_size.height(); }
     int getBpp() { return m_bpp; }
+    uint8* getPixel(int x, int y) { return &m_pixels[(y * m_size.width() + x) * 4]; }
 
 private:
     std::vector<uint8> m_pixels;
diff --git a/src/framework/graphics/texture.cpp b/src/framework/graphics/texture.cpp
index 4b6f0127..801384bc 100644
--- a/src/framework/graphics/texture.cpp
+++ b/src/framework/graphics/texture.cpp
@@ -142,6 +142,7 @@ void Texture::generateMipmaps()
         //FIXME: disabled because mipmaps size needs to be in base of 2,
         //       and the current algorithmn does not support that
         //generateSoftwareMipmaps(getPixels());
+        logTraceError("non power of 2.");
     }
 }
 
diff --git a/src/otclient/core/creature.cpp b/src/otclient/core/creature.cpp
index 969275c4..899c242f 100644
--- a/src/otclient/core/creature.cpp
+++ b/src/otclient/core/creature.cpp
@@ -133,6 +133,7 @@ void Creature::internalDrawOutfit(const Point& dest, float scaleFactor, bool ani
             outfitProgram->setUniformValue(FEET_COLOR_UNIFORM, m_outfit.getFeetColor());
             */
 
+            m_type->draw(dest, scaleFactor, 0, xPattern, yPattern, zPattern, animationPhase);
             for(int h = 0; h < getDimensionHeight(); h++) {
                 for(int w = 0; w < getDimensionWidth(); w++) {
                     // setup texture outfit mask
@@ -145,7 +146,6 @@ void Creature::internalDrawOutfit(const Point& dest, float scaleFactor, bool ani
                     */
 
                     Point p = dest + (-Point(w,h)*Otc::TILE_PIXELS)*scaleFactor;
-                    m_type->draw(p, scaleFactor, w, h, xPattern, yPattern, zPattern, 0, animationPhase);
 
                     if(getLayers() > 1) {
                         g_painter->setCompositionMode(Painter::CompositionMode_Multiply);
@@ -190,7 +190,7 @@ void Creature::internalDrawOutfit(const Point& dest, float scaleFactor, bool ani
         if(m_outfit.getCategory() == ThingsType::Effect)
             animationPhase = std::min(animationPhase+1, getAnimationPhases());
 
-        m_type->draw(dest, scaleFactor, 0, 0, 0, animationPhase);
+        m_type->draw(dest, scaleFactor, 0, 0, 0, 0, animationPhase);
     }
 }
 
diff --git a/src/otclient/core/effect.cpp b/src/otclient/core/effect.cpp
index 36ae0459..1ea7b45e 100644
--- a/src/otclient/core/effect.cpp
+++ b/src/otclient/core/effect.cpp
@@ -32,7 +32,7 @@ void Effect::draw(const Point& dest, float scaleFactor, bool animate)
     int animationPhase = 0;
     if(animate)
         animationPhase = std::min((int)(m_animationTimer.ticksElapsed() / Otc::EFFECT_TICKS_PER_FRAME), getAnimationPhases() - 1);
-    m_type->draw(dest, scaleFactor, 0, 0, 0, animationPhase);
+    m_type->draw(dest, scaleFactor, 0, 0, 0, 0, animationPhase);
 }
 
 void Effect::startAnimation()
diff --git a/src/otclient/core/item.cpp b/src/otclient/core/item.cpp
index 0d6624ee..bfeeefa3 100644
--- a/src/otclient/core/item.cpp
+++ b/src/otclient/core/item.cpp
@@ -181,7 +181,7 @@ void Item::draw(const Point& dest, float scaleFactor, bool animate)
     */
 
     // now we can draw the item
-    m_type->draw(dest, scaleFactor, xPattern, yPattern, zPattern, animationPhase);
+    m_type->draw(dest, scaleFactor, 0, xPattern, yPattern, zPattern, animationPhase);
 
     // release draw shader
     g_painter->resetShaderProgram();
diff --git a/src/otclient/core/missile.cpp b/src/otclient/core/missile.cpp
index bf3c6cae..264f62a1 100644
--- a/src/otclient/core/missile.cpp
+++ b/src/otclient/core/missile.cpp
@@ -63,7 +63,7 @@ void Missile::draw(const Point& dest, float scaleFactor, bool animate)
     }
 
     float fraction = m_animationTimer.ticksElapsed() / m_duration;
-    m_type->draw(dest + m_delta * fraction * scaleFactor, scaleFactor, xPattern, yPattern, 0, 0);
+    m_type->draw(dest + m_delta * fraction * scaleFactor, 0, scaleFactor, xPattern, yPattern, 0, 0);
 }
 
 void Missile::setPath(const Position& fromPosition, const Position& toPosition)
diff --git a/src/otclient/core/thingstype.cpp b/src/otclient/core/thingstype.cpp
index a611def4..698f063e 100644
--- a/src/otclient/core/thingstype.cpp
+++ b/src/otclient/core/thingstype.cpp
@@ -48,6 +48,7 @@ bool ThingsType::load(const std::string& file)
     for(int i = 0; i < LastCategory; ++i) {
         m_things[i].resize(numThings[i]);
         for(int id = 0; id < numThings[i]; ++id) {
+            m_things[i][id].m_category = i;
             if(!parseThingType(fin, m_things[i][id])) {
                 logError("corrupt or dat file");
                 return false;
@@ -142,10 +143,13 @@ bool ThingsType::parseThingType(const FileStreamPtr& fin, ThingType& thingType)
         return false;
 
     thingType.m_spritesIndex.resize(totalSprites);
-    thingType.m_sprites.resize(totalSprites);
     for(int i = 0; i < totalSprites; i++)
         thingType.m_spritesIndex[i] = fin->getU16();
 
+    thingType.m_textures.resize(thingType.m_dimensions[ThingType::AnimationPhases]);
+    thingType.m_texturesFramesRects.resize(thingType.m_dimensions[ThingType::AnimationPhases]);
+    thingType.m_texturesFramesOffsets.resize(thingType.m_dimensions[ThingType::AnimationPhases]);
+
     return true;
 }
 
diff --git a/src/otclient/core/thingtype.cpp b/src/otclient/core/thingtype.cpp
index 22a1cb72..4fe73b1e 100644
--- a/src/otclient/core/thingtype.cpp
+++ b/src/otclient/core/thingtype.cpp
@@ -21,6 +21,7 @@
  */
 
 #include "thingtype.h"
+#include "thingstype.h"
 #include "spritemanager.h"
 
 #include <framework/graphics/graphics.h>
@@ -34,23 +35,20 @@ ThingType::ThingType()
     m_properties.fill(false);
 }
 
-void ThingType::draw(const Point& dest, float scaleFactor, int w, int h, int xPattern, int yPattern, int zPattern, int layer, int animationPhase)
+void ThingType::draw(const Point& dest, float scaleFactor, int layer, int xPattern, int yPattern, int zPattern, int animationPhase)
 {
-    int scaledSize = Otc::TILE_PIXELS * scaleFactor;
+    const TexturePtr& texture = getTexture(animationPhase); // rects might not be calculated yet.
+
+    int frameIndex = getTextureIndex(layer, xPattern, yPattern, zPattern);
+    Point textureOffset = m_texturesFramesOffsets[animationPhase][frameIndex];
+    Rect textureRect = m_texturesFramesRects[animationPhase][frameIndex];
 
     Point displacement(m_parameters[DisplacementX], m_parameters[DisplacementY]);
+    Rect screenRect(dest - displacement - Point(32 * m_dimensions[Width] * scaleFactor, 32 * m_dimensions[Height] * scaleFactor) + Point(32, 32) + textureOffset,
+                    textureRect.size() * scaleFactor);
 
-    Rect drawRect(dest - displacement*scaleFactor, Size(scaledSize, scaledSize));
     g_painter->setColor(Color::white);
-    g_painter->drawTexturedRect(drawRect, getSprite(w, h, layer, xPattern, yPattern, zPattern, animationPhase));
-}
-
-void ThingType::draw(const Point& dest, float scaleFactor, int xPattern, int yPattern, int zPattern, int animationPhase)
-{
-    for(int l = 0; l < m_dimensions[Layers]; ++l)
-        for(int w = 0; w < m_dimensions[Width]; ++w)
-            for(int h = 0; h < m_dimensions[Height]; ++h)
-                draw(dest - Point(w,h)*Otc::TILE_PIXELS*scaleFactor, scaleFactor, w, h, xPattern, yPattern, zPattern, l, animationPhase);
+    g_painter->drawTexturedRect(screenRect, texture, textureRect);
 }
 
 void ThingType::drawMask(const Point& dest, float scaleFactor, int w, int h, int xPattern, int yPattern, int zPattern, int layer, int animationPhase, ThingType::SpriteMask mask)
@@ -63,26 +61,6 @@ void ThingType::drawMask(const Point& dest, float scaleFactor, int w, int h, int
     g_painter->drawTexturedRect(drawRect, getSpriteMask(w, h, layer, xPattern, yPattern, zPattern, animationPhase, mask));
 }
 
-TexturePtr& ThingType::getSprite(int w, int h, int l, int x, int y, int z, int a)
-{
-    uint index = getSpriteIndex(w,h,l,x,y,z,a);
-    TexturePtr& spriteTexture = m_sprites[index];
-    if(!spriteTexture) {
-        ImagePtr spriteImage = g_sprites.getSpriteImage(m_spritesIndex[index]);
-        if(!spriteImage)
-            spriteTexture = g_graphics.getEmptyTexture();
-        else {
-            spriteTexture = TexturePtr(new Texture(spriteImage));
-            spriteTexture->setSmooth(true);
-
-            if(g_graphics.canUseMipmaps())
-                spriteTexture->generateSoftwareMipmaps(spriteImage->getPixels());
-        }
-    }
-
-    return spriteTexture;
-}
-
 TexturePtr& ThingType::getSpriteMask(int w, int h, int l, int x, int y, int z, int a, ThingType::SpriteMask mask)
 {
     if(m_spritesMask.size() == 0)
@@ -108,3 +86,103 @@ TexturePtr& ThingType::getSpriteMask(int w, int h, int l, int x, int y, int z, i
 
     return maskTexture;
 }
+
+TexturePtr& ThingType::getTexture(int animationPhase)
+{
+    TexturePtr& animationPhaseTexture = m_textures[animationPhase];
+    if(!animationPhaseTexture) {
+
+        int textureLayers = m_dimensions[Layers];
+        if(m_category != ThingsType::Creature) // we dont need layers in texture. they can be 'rendered' now.
+            textureLayers = 1;
+
+        int indexSize = textureLayers * m_dimensions[PatternX] * m_dimensions[PatternY] * m_dimensions[PatternZ];
+        Size textureSize = getBestDimension(m_dimensions[Width], m_dimensions[Height], indexSize);
+        ImagePtr fullImage = ImagePtr(new Image(textureSize * 32));
+
+        m_texturesFramesRects[animationPhase].resize(indexSize);
+        m_texturesFramesOffsets[animationPhase].resize(indexSize);
+
+        for(int z = 0; z < m_dimensions[PatternZ]; ++z) {
+            for(int y = 0; y < m_dimensions[PatternY]; ++y) {
+                for(int x = 0; x < m_dimensions[PatternX]; ++x) {
+                    for(int l = 0; l < m_dimensions[Layers]; ++l) {
+
+                        int frameIndex = getTextureIndex(l % textureLayers, x, y, z);
+                        Point framePos = Point(frameIndex % (textureSize.width() / m_dimensions[Width]) * m_dimensions[Width],
+                                               frameIndex / (textureSize.width() / m_dimensions[Width]) * m_dimensions[Height]) * 32;
+
+                        for(int h = 0; h < m_dimensions[Height]; ++h) {
+                            for(int w = 0; w < m_dimensions[Width]; ++w) {
+                                uint spriteIndex = getSpriteIndex(w, h, l, x, y, z, animationPhase);
+                                ImagePtr spriteImage = g_sprites.getSpriteImage(m_spritesIndex[spriteIndex]);
+                                if(spriteImage) {
+                                    Point spritePos = Point(m_dimensions[Width]  - w - 1,
+                                                            m_dimensions[Height] - h - 1) * 32;
+
+                                    fullImage->append(framePos + spritePos, spriteImage);
+                                }
+                            }
+                        }
+
+                        Rect drawRect(framePos + Point(m_dimensions[Width], m_dimensions[Height]) * 32, framePos);
+                        for(int x = framePos.x; x < framePos.x + m_dimensions[Width] * 32; ++x) {
+                            for(int y = framePos.y; y < framePos.y + m_dimensions[Height] * 32; ++y) {
+                                uint8 *p = fullImage->getPixel(x,y);
+                                if(p[3] != 0x00) {
+                                    drawRect.setTop(std::min(y, (int)drawRect.top()));
+                                    drawRect.setLeft(std::min(x, (int)drawRect.left()));
+                                    drawRect.setBottom(std::max(y, (int)drawRect.bottom()));
+                                    drawRect.setRight(std::max(x, (int)drawRect.right()));
+                                }
+                            }
+                        }
+
+                        m_texturesFramesRects[animationPhase][frameIndex] = drawRect;
+                        m_texturesFramesOffsets[animationPhase][frameIndex] = drawRect.topLeft() - framePos;
+                    }
+                }
+            }
+        }
+        animationPhaseTexture = TexturePtr(new Texture(fullImage));
+        animationPhaseTexture->setSmooth(true);
+
+        //if(g_graphics.canUseMipmaps())
+            //animationPhaseTexture->generateSoftwareMipmaps(fullImage->getPixels());
+    }
+    return animationPhaseTexture;
+}
+
+Size ThingType::getBestDimension(int w, int h, int count)
+{
+    const int MAX = 16;
+
+    int k = 1;
+    while(k < w)
+        k<<=1;
+    w = k;
+
+    k = 1;
+    while(k < h)
+        k<<=1;
+    h = k;
+
+    int numSprites = w*h*count;
+    assert(numSprites <= MAX*MAX);
+    assert(w <= MAX);
+    assert(h <= MAX);
+
+    Size bestDimension = Size(MAX, MAX);
+    for(int i=w;i<=MAX;i<<=1) {
+        for(int j=h;j<=MAX;j<<=1) {
+            Size candidateDimension = Size(i, j);
+            if(candidateDimension.area() < numSprites)
+                continue;
+            if((candidateDimension.area() < bestDimension.area()) ||
+               (candidateDimension.area() == bestDimension.area() && candidateDimension.width() + candidateDimension.height() < bestDimension.width() + bestDimension.height()))
+                bestDimension = candidateDimension;
+        }
+    }
+
+    return bestDimension;
+}
diff --git a/src/otclient/core/thingtype.h b/src/otclient/core/thingtype.h
index 9947c895..df3aa9ae 100644
--- a/src/otclient/core/thingtype.h
+++ b/src/otclient/core/thingtype.h
@@ -24,8 +24,8 @@
 #define THINGATTRIBUTES_H
 
 #include "declarations.h"
-
 #include <framework/graphics/declarations.h>
+#include <framework/graphics/coordsbuffer.h>
 
 struct ThingType
 {
@@ -108,18 +108,20 @@ struct ThingType
 
     ThingType();
 
-    void draw(const Point& dest, float scaleFactor, int w, int h, int xPattern, int yPattern, int zPattern, int layer, int animationPhase);
-    void draw(const Point& dest, float scaleFactor, int xPattern, int yPattern, int zPattern, int animationPhase);
+    void draw(const Point& dest, float scaleFactor, int layer, int xPattern, int yPattern, int zPattern, int animationPhase);
     void drawMask(const Point& dest, float scaleFactor, int w, int h, int xPattern, int yPattern, int zPattern, int layer, int animationPhase, SpriteMask mask);
 
     TexturePtr& getSprite(int w, int h, int l, int x, int y, int z, int a);
     TexturePtr& getSpriteMask(int w, int h, int l, int x, int y, int z, int a, SpriteMask mask);
+    TexturePtr& getTexture(int animationPhase);
 
     bool getProperty(Property property) { return m_properties[property]; }
     int getParameter(Parameter param) { return m_parameters[param]; }
     int getDimension(Dimension dimension) { return m_dimensions[dimension]; }
 
 private:
+    Size getBestDimension(int w, int h, int count);
+
     uint getSpriteIndex(int w, int h, int l, int x, int y, int z, int a) {
         uint index = ((((((a % m_dimensions[ThingType::AnimationPhases])
             * m_dimensions[ThingType::PatternZ] + z)
@@ -128,17 +130,28 @@ private:
             * m_dimensions[ThingType::Layers] + l)
             * m_dimensions[ThingType::Height] + h)
             * m_dimensions[ThingType::Width] + w;
-        assert(index < m_sprites.size());
+        assert(index < m_spritesIndex.size());
         return index;
     }
 
+    uint getTextureIndex(int l, int x, int y, int z) {
+        return ((l
+                * m_dimensions[ThingType::PatternZ] + z)
+                * m_dimensions[ThingType::PatternY] + y)
+                * m_dimensions[ThingType::PatternX] + x;
+    }
+
+    int m_category;
     std::array<int, LastDimension> m_dimensions;
     std::array<int, LastParameter> m_parameters;
     std::array<bool, LastProperty> m_properties;
     std::vector<int> m_spritesIndex;
-    std::vector<TexturePtr> m_sprites;
     std::vector<std::array<TexturePtr, LastMask>> m_spritesMask;
 
+    std::vector<TexturePtr> m_textures;
+    std::vector<std::vector<Rect> > m_texturesFramesRects;
+    std::vector<std::vector<Point> > m_texturesFramesOffsets;
+
     friend class ThingsType;
 };
 
diff --git a/src/otclient/ui/uiitem.cpp b/src/otclient/ui/uiitem.cpp
index ce636a0d..6f761bf8 100644
--- a/src/otclient/ui/uiitem.cpp
+++ b/src/otclient/ui/uiitem.cpp
@@ -53,6 +53,7 @@ void UIItem::drawSelf()
             g_painter->setColor(Color(231, 231, 231));
             m_font->drawText(count, Rect(m_rect.topLeft(), m_rect.bottomRight() - Point(3, 0)), Fw::AlignBottomRight);
         }
+        // debug, show item id
         //m_font->drawText(Fw::tostring(m_item->getId()), m_rect, Fw::AlignBottomRight);
     }
 }