Sorry for the confusion. It is hard to explain when English is not your native.

I try to create a Glass and vine with shader.

At first I study BB Glass shader, use his tipps and tricks in Matmatik, write the code, but my shader looked odd.

So I build up a new from scratch without MatMatic. The Glass looks fine to me till now, only the redvine looks dull.

For this I would like to have some suggestions. 

Why the red looks so dull? 

La vie est éternelle. L'amour est immortel.

“Dwell on the beauty of life. Watch the stars, and see yourself running with them.”
― Marcus Aurelius,