1,render use 2degree why no bump while 3degree(opengl +4) has bump?can opengl ssl be +4?

2,can light model be "skin'?

3,bumpmap RGB is right?and the specularmap RGB can be high as bumpmap RGB?

4,bump scale is right?

5,in shader mixer,can that connect be right,why after connection,no image and the gray color

6,after bump render,in the middle is white ,while side has bump map?and no any horizon or verticle expression as like no bump image?