reading "semantic Layers for Illustrative Volume Rendering" Second time

today, I read the "semantic Layers for Illustrative Volume Rendering" for the second time. and get some different feeling with last time.

I think why  this paper succeeds with my rejected rule-based volume renderng paper  is: it combines the rule with the style. However I just combine the rule with the opacity in transfer function.

At the same time, the author extended his work with the sytles, such as Parameterization, Layered styles. But I just emphasis transfer function, didn't import many domain knowledge. If I add more knowledge in flow, maybe the situation is different.

In a short, just a idea for a paper is not enough. I should extend it and make it is some completed. After reading many papers, I think this is very important!