diff --git a/stim/gl/gl_spider.h b/stim/gl/gl_spider.h
index cbe379e..4efe020 100644
--- a/stim/gl/gl_spider.h
+++ b/stim/gl/gl_spider.h
@@ -870,7 +870,7 @@ class gl_spider : public virtual gl_texture<T>
 			GenerateFBO(16, numSamplesMag*8, mtexbufferID, mfboID); 
 			GenerateFBO(16, 216, btexbufferID, bfboID); 
 			setDims(0.6, 0.6, 1.0);
-			setSize(512.0, 512.0, 426.0);
+			setSize(1024.0, 1024.0, 1024.0);
 			setMatrix();
 			dList = glGenLists(3);
 			glListBase(dList);
@@ -1058,6 +1058,7 @@ class gl_spider : public virtual gl_texture<T>
 		void
 		setSeedMag(float mag)
 		{
+			std::cout << "sMag: " << mag << std::endl;
 			seedsmags.push(mag);
 		}
 
@@ -1070,6 +1071,7 @@ class gl_spider : public virtual gl_texture<T>
 		void
 		setSeed(float x, float y, float z)
 		{
+			std::cout << "sPos: " << x << " " << y << " " << z << std::endl;
 			seeds.push(stim::vec<float>(x, y, z));
 		}
 
@@ -1080,6 +1082,7 @@ class gl_spider : public virtual gl_texture<T>
 		void
 		setSeedVec(float x, float y, float z)
 		{
+			std::cout << "sDir: " << x << " " << y << " " << z << std::endl;
 			seedsvecs.push(stim::vec<float>(x, y, z));
 		}
 		
@@ -1239,6 +1242,7 @@ class gl_spider : public virtual gl_texture<T>
 					 (std::clock() - start) / (double) CLOCKS_PER_SEC;
 				num_sampling = num_sampling + 1.0; 
 			#endif
+			std::cout << current_cost << std::endl;
 			return current_cost;
 		}
 
@@ -1480,7 +1484,7 @@ class gl_spider : public virtual gl_texture<T>
 					spos[2] = spos[2]-sdir[2]*smag[0]/2.;
 					int h = selectObject(spos, -sdir, smag[0]);
 					//did we start with a fiber?
-					if(h != -1)
+					if(h != -1 && h < nt.sizeE())
 						nt.addEdge(ce, cm, h, -1);
 					else
 						nt.addEdge(ce, cm, -1, -1);
@@ -1494,7 +1498,7 @@ class gl_spider : public virtual gl_texture<T>
 					spos[2] = spos[2]-sdir[2]*smag[0]/2.;
 					int h = selectObject(spos, -sdir, smag[0]);
 					//did start with a fiber?
-					if(h != -1 && h != nt.sizeE()){	
+					if(h != -1 && h < nt.sizeE()){	
 			//			std::cout << "got here double" << smag.str() << std::endl;
 						nt.addEdge(ce,cm, h, in.second);	
 					} else { nt.addEdge(ce,cm, -1, -1);}
--
libgit2 0.21.4