diff --git a/client/main.c b/client/main.c
index 3ff1cb0..dead48c 100644
--- a/client/main.c
+++ b/client/main.c
@@ -39,12 +39,24 @@ static void tick(void){
 }
 
 static GSVector3 rot = {0, 0, 0};
+static GSVector3 pos = {0, 0, 0};
 static GSModel model = NULL;
 
 static void render(GSEngine self){
 	GSGL gl = GSClientGetGL(GSEngineGetClient(self));
 
+	pos[1] = 0;
+
 	GSGLPushMatrix(gl);
+	GSGLSetPosition(gl, pos);
+	GSGLSetRotation(gl, rot);
+	if(model != NULL) GSModelDraw(model);
+	GSGLPopMatrix(gl);
+
+	pos[1] = 1;
+
+	GSGLPushMatrix(gl);
+	GSGLSetPosition(gl, pos);
 	GSGLSetRotation(gl, rot);
 	if(model != NULL) GSModelDraw(model);
 	GSGLPopMatrix(gl);
@@ -52,6 +64,9 @@ static void render(GSEngine self){
 
 static void after_render(GSEngine self){
 	rot[0] = rot[1] = rot[2] += (1.0 / GSEngineGetTPS(self)) * 90;
+
+	pos[0] = cos(rot[0] / 180 * GSMathPi);
+	pos[2] = sin(rot[0] / 180 * GSMathPi);
 }
 
 #ifndef _WIN32
@@ -86,7 +101,7 @@ int main(int argc, char** argv){
 
 		GSClientSetSkybox(GSEngineGetClient(engine), GSTrue);
 		
-		if((sound = GSSoundOpen(GSClientGetSoundEngine(GSEngineGetClient(engine)), "game:/shanghai.mp3")) != NULL){
+		if((sound = GSSoundOpen(GSClientGetSoundEngine(GSEngineGetClient(engine)), "game:/df97.xm")) != NULL){
 			GSSoundSetLoop(sound, 1);
 			GSSoundStart(sound);
 		}
diff --git a/engine/src/client.c b/engine/src/client.c
index ff33c15..b31d292 100644
--- a/engine/src/client.c
+++ b/engine/src/client.c
@@ -98,6 +98,17 @@ void GSClientDestroy(GSClient client) {
 
 static void scene(GSClient client) {
 	if(client->engine->param->render != NULL) client->engine->param->render(client->engine);
+
+	GSVector3 n   = {0, 1, 0};
+	GSVector3 q[] = {
+	    {-3, -1, 3},
+	    {-3, -1, -3},
+	    {3, -1, -3},
+	    {3, -1, 3}};
+
+	GSGLTextureSet(client->gl, 2);
+	GSGLPolygon(client->gl, 4, q, NULL, n);
+	GSGLTextureSet(client->gl, 0);
 }
 
 void GSClientStep(GSClient client) {
diff --git a/engine/src/gl/gl_camera.c b/engine/src/gl/gl_camera.c
index 5b94aa3..a0b2e23 100644
--- a/engine/src/gl/gl_camera.c
+++ b/engine/src/gl/gl_camera.c
@@ -52,17 +52,17 @@ void GSGLCameraLookAt(GSGL gl, GSVector3 camera, GSVector3 look_at) {
 	for(i = 0; i < 16; i++) matrix[i] = 0;
 	matrix[4 * 0 + 0] = s[0];
 	matrix[4 * 1 + 0] = s[1];
-	matrix[4 * 2 + 0] = s[2];
+	matrix[4 * 2 + 0] = -s[2];
 	matrix[4 * 0 + 1] = u[0];
 	matrix[4 * 1 + 1] = u[1];
-	matrix[4 * 2 + 1] = u[2];
+	matrix[4 * 2 + 1] = -u[2];
 	matrix[4 * 0 + 2] = -f[0];
 	matrix[4 * 1 + 2] = -f[1];
-	matrix[4 * 2 + 2] = -f[2];
+	matrix[4 * 2 + 2] = f[2];
 	matrix[4 * 3 + 3] = 1;
 
 	glMultMatrixd(matrix);
-	glTranslated(-camera[0], -camera[1], -camera[2]);
+	glTranslated(-camera[0], -camera[1], camera[2]);
 }
 
 void GSGLCameraSetup(GSGL gl) {
diff --git a/engine/src/model.c b/engine/src/model.c
index bd5ee3c..2648b6e 100644
--- a/engine/src/model.c
+++ b/engine/src/model.c
@@ -137,7 +137,7 @@ static void parse_obj(GSModel model, char* txt) {
 							if(arrlen(model->vertex) > varr[i] * 3) {
 								face.vertex[i][0] = (model->vertex[varr[i] * 3 + 0] - lm - lr / 2) / sc;
 								face.vertex[i][1] = (model->vertex[varr[i] * 3 + 1] - dm - ud / 2) / sc;
-								face.vertex[i][2] = (model->vertex[varr[i] * 3 + 2] - bm - bf / 2) / sc;
+								face.vertex[i][2] = -(model->vertex[varr[i] * 3 + 2] - bm - bf / 2) / sc;
 							}
 
 							if(arrlen(model->texcoord) > tarr[i] * 2) {
@@ -147,8 +147,8 @@ static void parse_obj(GSModel model, char* txt) {
 						}
 					}
 
-					if(c == 3) GSMathNormal3x3(face.normal, face.vertex[0], face.vertex[1], face.vertex[2]);
-					if(c == 4) GSMathNormal3x4(face.normal, face.vertex[0], face.vertex[1], face.vertex[2], face.vertex[3]);
+					if(c == 3) GSMathNormal3x3(face.normal, face.vertex[2], face.vertex[1], face.vertex[0]);
+					if(c == 4) GSMathNormal3x4(face.normal, face.vertex[3], face.vertex[2], face.vertex[1], face.vertex[0]);
 
 					arrput(model->face, face);
 				}
diff --git a/engine/src/skybox.c b/engine/src/skybox.c
index 09cf67f..3f18299 100644
--- a/engine/src/skybox.c
+++ b/engine/src/skybox.c
@@ -100,45 +100,45 @@ void GSSkyBoxDraw(GSSkyBox skybox) {
 		if(i == 0) {
 			tex = skybox->left;
 
-			v[0][0] = -1, v[0][1] = 1 + s, v[0][2] = 1 + s;
-			v[1][0] = -1, v[1][1] = -1 - s, v[1][2] = 1 + s;
-			v[2][0] = -1, v[2][1] = -1 - s, v[2][2] = -1 - s;
-			v[3][0] = -1, v[3][1] = 1 + s, v[3][2] = -1 - s;
+			v[0][0] = -1, v[0][1] = 1 + s, v[0][2] = -1 - s;
+			v[1][0] = -1, v[1][1] = -1 - s, v[1][2] = -1 - s;
+			v[2][0] = -1, v[2][1] = -1 - s, v[2][2] = 1 + s;
+			v[3][0] = -1, v[3][1] = 1 + s, v[3][2] = 1 + s;
 		} else if(i == 1) {
 			tex = skybox->right;
 
-			v[0][0] = 1, v[0][1] = 1 + s, v[0][2] = -1 - s;
-			v[1][0] = 1, v[1][1] = -1 - s, v[1][2] = -1 - s;
-			v[2][0] = 1, v[2][1] = -1 - s, v[2][2] = 1 + s;
-			v[3][0] = 1, v[3][1] = 1 + s, v[3][2] = 1 + s;
+			v[0][0] = 1, v[0][1] = 1 + s, v[0][2] = 1 + s;
+			v[1][0] = 1, v[1][1] = -1 - s, v[1][2] = 1 + s;
+			v[2][0] = 1, v[2][1] = -1 - s, v[2][2] = -1 - s;
+			v[3][0] = 1, v[3][1] = 1 + s, v[3][2] = -1 - s;
 		} else if(i == 2) {
 			tex = skybox->front;
 
-			v[0][0] = -1 - s, v[0][1] = 1 + s, v[0][2] = -1;
-			v[1][0] = -1 - s, v[1][1] = -1 - s, v[1][2] = -1;
-			v[2][0] = 1 + s, v[2][1] = -1 - s, v[2][2] = -1;
-			v[3][0] = 1 + s, v[3][1] = 1 + s, v[3][2] = -1;
+			v[0][0] = -1 - s, v[0][1] = 1 + s, v[0][2] = 1;
+			v[1][0] = -1 - s, v[1][1] = -1 - s, v[1][2] = 1;
+			v[2][0] = 1 + s, v[2][1] = -1 - s, v[2][2] = 1;
+			v[3][0] = 1 + s, v[3][1] = 1 + s, v[3][2] = 1;
 		} else if(i == 3) {
 			tex = skybox->back;
 
-			v[0][0] = 1 + s, v[0][1] = 1 + s, v[0][2] = 1;
-			v[1][0] = 1 + s, v[1][1] = -1 - s, v[1][2] = 1;
-			v[2][0] = -1 - s, v[2][1] = -1 - s, v[2][2] = 1;
-			v[3][0] = -1 - s, v[3][1] = 1 + s, v[3][2] = 1;
+			v[0][0] = 1 + s, v[0][1] = 1 + s, v[0][2] = -1;
+			v[1][0] = 1 + s, v[1][1] = -1 - s, v[1][2] = -1;
+			v[2][0] = -1 - s, v[2][1] = -1 - s, v[2][2] = -1;
+			v[3][0] = -1 - s, v[3][1] = 1 + s, v[3][2] = -1;
 		} else if(i == 4) {
 			tex = skybox->up;
 
-			v[0][0] = -1 - s, v[0][1] = 1, v[0][2] = 1 + s;
-			v[1][0] = -1 - s, v[1][1] = 1, v[1][2] = -1 - s;
-			v[2][0] = 1 + s, v[2][1] = 1, v[2][2] = -1 - s;
-			v[3][0] = 1 + s, v[3][1] = 1, v[3][2] = 1 + s;
+			v[0][0] = -1 - s, v[0][1] = 1, v[0][2] = -1 - s;
+			v[1][0] = -1 - s, v[1][1] = 1, v[1][2] = 1 + s;
+			v[2][0] = 1 + s, v[2][1] = 1, v[2][2] = 1 + s;
+			v[3][0] = 1 + s, v[3][1] = 1, v[3][2] = -1 - s;
 		} else if(i == 5) {
 			tex = skybox->down;
 
-			v[0][0] = -1 - s, v[0][1] = -1, v[0][2] = -1 - s;
-			v[1][0] = -1 - s, v[1][1] = -1, v[1][2] = 1 + s;
-			v[2][0] = 1 + s, v[2][1] = -1, v[2][2] = 1 + s;
-			v[3][0] = 1 + s, v[3][1] = -1, v[3][2] = -1 - s;
+			v[0][0] = -1 - s, v[0][1] = -1, v[0][2] = 1 + s;
+			v[1][0] = -1 - s, v[1][1] = -1, v[1][2] = -1 - s;
+			v[2][0] = 1 + s, v[2][1] = -1, v[2][2] = -1 - s;
+			v[3][0] = 1 + s, v[3][1] = -1, v[3][2] = 1 + s;
 		}
 
 		GSGLTextureSet(gl, tex);
@@ -159,10 +159,10 @@ void GSSkyBoxDraw(GSSkyBox skybox) {
 			n[1] = -1;
 			n[2] = 0;
 
-			vc[0][0] = -1 - s, vc[0][1] = 1, vc[0][2] = 1 - s;
-			vc[1][0] = -1 - s, vc[1][1] = 1, vc[1][2] = -1 + s;
-			vc[2][0] = 1 - s, vc[2][1] = 1, vc[2][2] = -1 + s;
-			vc[3][0] = 1 - s, vc[3][1] = 1, vc[3][2] = 1 - s;
+			vc[0][0] = -1 - s, vc[0][1] = 1, vc[0][2] = -1 - s;
+			vc[1][0] = -1 - s, vc[1][1] = 1, vc[1][2] = 1 + s;
+			vc[2][0] = 1 - s, vc[2][1] = 1, vc[2][2] = 1 + s;
+			vc[3][0] = 1 - s, vc[3][1] = 1, vc[3][2] = -1 - s;
 
 			tc[0][0] = -1, tc[0][1] = -1;
 			tc[1][0] = -1, tc[1][1] = 1;
diff --git a/engine/logo.sh b/engine/tools/logo.sh
similarity index 100%
rename from engine/logo.sh
rename to engine/tools/logo.sh