ps_1_1								// Declare, PS v1.1

def		c3, 0, 1, 0, 0				// Dot product to extract red component

tex		t0							// Look up the base texture #0 from the base (scaled) coordinates
tex		t1							// Look up the base texture #1 from the base (scaled) coordinates
tex		t2							// Look up the base texture #2 from the base (scaled) coordinates

mul		r0.rgb, t0, v0.a			// Multiply the base texture #0 by its alpha value
mad		r0.rgb, t1, v1.a, r0		// Mulitply the base texture #1 by its alpha value, and add to previous result
dp3		r1, c3, v1					// Extract the alpha for texture #2.
mad		r0.rgb, t2, r1, r0			// Mulitply the base texture #2 by its alpha value, and add to t#0's alpha'd value	
mul		r0.rgb, r0, v0				// Multiply the alpha'd base texture by the diffuse color
+mov	r0.a, r1.b					// Move the total alpha into the final alpha
									// Instructions : 4 texture, 6 arithmetic = 10