hah! found the error
the technique was on 3.0
Pixelshader = compile ps_3_0 main_PS();

changing it to Pixelshader = compile ps_2_0 main_PS(); and it works like a charme and looks like the nvidia screenshot! :]

oh, and I got an request for a shader

lava shader!


non-realtime maya lava shader:
http://www.9jcg.com/comm_pages/blog_content-art-94.htm