hi, i found something that may work for you. look here to see it work

this is the pixelshader i am using. the alpha-effect appeared after i placed the dp3 instruction.
just try it out

Code:

---

 
				PixelShader =
				asm {
					ps.1.1 ; painter pixel shader
					tex t0                 
					texcoord t1
					tex t2
					                 
					add r0,t0,t1
					add r1,r0,t2
					add r0,r0,r1
					mad r0,r0,r0,t2
					dp3 r0,r0,t0
					//add r0,r0,r2
					
				};

 

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