diff -Naur blender2.42/source/blender/blenkernel/BKE_node.h blender-work/source/blender/blenkernel/BKE_node.h
--- blender2.42/source/blender/blenkernel/BKE_node.h	2006-07-03 05:49:12.000000000 -0400
+++ blender-work/source/blender/blenkernel/BKE_node.h	2006-07-16 05:43:08.000000000 -0400
@@ -224,7 +224,7 @@
 #define CMP_NODE_TEXTURE		224
 #define CMP_NODE_TRANSLATE		225
 #define CMP_NODE_ZCOMBINE		226
-
+#define CMP_NODE_CHROMA		227
 
 /* filter types */
 #define CMP_FILT_SOFT		0
diff -Naur blender2.42/source/blender/blenkernel/intern/node.c blender-work/source/blender/blenkernel/intern/node.c
--- blender2.42/source/blender/blenkernel/intern/node.c	2006-07-09 07:54:41.000000000 -0400
+++ blender-work/source/blender/blenkernel/intern/node.c	2006-07-16 14:40:22.000000000 -0400
@@ -796,6 +796,13 @@
 			nhs->hue= 0.5f;
 			nhs->sat= 1.0f;
 		}
+		else if(type==CMP_NODE_CHROMA){
+			NodeChroma *c=MEM_callocN(sizeof(NodeChroma), "node chroma");
+			node->storage=c;
+			c->rt=0.01f;
+			c->bt=0.01f;
+                        c->gt=0.01f;
+		}
 	}
 	
 	return node;
diff -Naur blender2.42/source/blender/blenkernel/intern/node_composite.c blender-work/source/blender/blenkernel/intern/node_composite.c
--- blender2.42/source/blender/blenkernel/intern/node_composite.c	2006-07-03 11:25:11.000000000 -0400
+++ blender-work/source/blender/blenkernel/intern/node_composite.c	2006-07-16 15:48:40.000000000 -0400
@@ -2884,6 +2884,88 @@
 	/* execfunc    */	node_composit_exec_translate
 };
 
+/* ******************* Chroma Key ********************************* */
+static bNodeSocketType cmp_node_chroma_in[]={
+	{SOCK_RGBA,1,"Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{SOCK_RGBA,1,"Key", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{-1,0,""},
+};
+
+static bNodeSocketType cmp_node_chroma_out[]={
+	{SOCK_RGBA,0,"Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{SOCK_VALUE,0,"Alpha",0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+	{-1,0,""}
+};
+
+
+static void node_composit_exec_chroma(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
+{
+   int i, j;
+
+   float minR, maxR;
+   float minG, maxG;
+   float minB, maxB;
+
+   if(out[0]->hasoutput==0 || in[0]->hasinput==0) return;
+   if(in[0]->data==NULL) return;
+
+   NodeChroma *c=node->storage;
+
+   CompBuf *cbuf=in[0]->data;
+   CompBuf *rgbbuf=alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA,1);
+
+   int max=cbuf->x*cbuf->y*4;
+
+   minR=in[1]->vec[0]-c->rt;
+   maxR=in[1]->vec[0]+c->rt;
+   minG=in[1]->vec[1]-c->gt;
+   maxG=in[1]->vec[1]+c->gt;
+   minB=in[1]->vec[2]-c->bt;
+   maxB=in[1]->vec[2]+c->bt;
+
+   for(i=0;i<max;i+=4)
+   {
+      if((minR < cbuf->rect[i+0] && cbuf->rect[i+0] < maxR) &&
+         (minG < cbuf->rect[i+1] && cbuf->rect[i+1] < maxG) &&
+         (minB < cbuf->rect[i+2] && cbuf->rect[i+2] < maxB))
+      {
+         rgbbuf->rect[i+0]=0.0;
+         rgbbuf->rect[i+1]=0.0;
+         rgbbuf->rect[i+2]=0.0;
+         rgbbuf->rect[i+3]=0.0;
+      }
+      else
+      {
+         rgbbuf->rect[i+0]=cbuf->rect[i+0];
+         rgbbuf->rect[i+1]=cbuf->rect[i+1];
+         rgbbuf->rect[i+2]=cbuf->rect[i+2];
+         rgbbuf->rect[i+3]=1.0;
+      }
+   }
+
+   CompBuf *alphabuf=valbuf_from_rgbabuf(rgbbuf,CHAN_A);
+
+   out[0]->data=rgbbuf;
+   out[1]->data=alphabuf;
+}
+
+static bNodeType cmp_node_chroma={
+        /* type code   */       CMP_NODE_CHROMA,
+        /* name        */       "ChromaKey",
+        /* width+range */       200, 80, 250,
+        /* class+opts  */       NODE_CLASS_OP_COLOR, NODE_OPTIONS,
+        /* input sock  */       cmp_node_chroma_in,
+        /* output sock */       cmp_node_chroma_out,
+        /* storage     */       "NodeChroma",
+        /* execfunc    */       node_composit_exec_chroma
+								
+};
+
+
+/* ******************* Chroma Key ********************************* */
+
+
+
 
 /* ****************** types array for all shaders ****************** */
 
@@ -2915,6 +2997,7 @@
 	&cmp_node_texture,
 	&cmp_node_translate,
 	&cmp_node_zcombine,
+	&cmp_node_chroma,
 	NULL
 };
 
diff -Naur blender2.42/source/blender/makesdna/DNA_node_types.h blender-work/source/blender/makesdna/DNA_node_types.h
--- blender2.42/source/blender/makesdna/DNA_node_types.h	2006-06-17 09:04:09.000000000 -0400
+++ blender-work/source/blender/makesdna/DNA_node_types.h	2006-07-16 14:37:13.000000000 -0400
@@ -196,5 +196,9 @@
 	float hue, sat;
 } NodeHueSat;
 
+typedef struct NodeChroma {
+	float rt, gt, bt;
+} NodeChroma;
+
 #endif
 
diff -Naur blender2.42/source/blender/src/drawnode.c blender-work/source/blender/src/drawnode.c
--- blender2.42/source/blender/src/drawnode.c	2006-07-03 05:49:12.000000000 -0400
+++ blender-work/source/blender/src/drawnode.c	2006-07-16 14:37:11.000000000 -0400
@@ -985,6 +985,26 @@
 	return 38;
 }
 
+static int node_composit_buts_chroma(uiBlock *block, bNodeTree *ntree, bNode *node, rctf *butr)
+{
+	if(block) 
+	{
+		NodeChroma *c= node->storage;
+		
+		uiBlockBeginAlign(block);
+		uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Red Tolerance ",
+				  butr->xmin, butr->ymin+38.0f, butr->xmax-butr->xmin, 19, 
+				  &c->rt, 0.0f, 1.0f, 100, 0, "");
+		uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Green Tolerance ",
+				  butr->xmin, butr->ymin+19.0f, butr->xmax-butr->xmin, 19, 
+				  &c->gt, 0.0f, 1.0f, 100, 0, "");
+		uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Blue Tolerance ",
+				  butr->xmin, butr->ymin, butr->xmax-butr->xmin, 19, 
+				  &c->bt, 0.0f, 1.0f, 100, 0, "");
+	}
+	return 57;
+}
+
 
 /* only once called */
 static void node_composit_set_butfunc(bNodeType *ntype)
@@ -1044,6 +1064,9 @@
 		case CMP_NODE_TEXTURE:
 			ntype->butfunc= node_buts_texture;
 			break;
+		case CMP_NODE_CHROMA:
+			ntype->butfunc=node_composit_buts_chroma;
+			break;
 		default:
 			ntype->butfunc= NULL;
 	}