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?

1 Only the best setting, 3Delight, will give you all the features of a shader. All other modes use OpenGL, and only the DAZ Default Sahder has an OpenGl version (which does not do everything even then). 2. Yes, if you are using the DAZ Default Shader. Other shaders don't have an equivalent of the Lighting Model, which is switching to different shaders behind the scenes using default values for the properties that aren't common to all the shader modes. 3. Bump, displacement and all of the Strength maps can be greyscale or RGB. I don't understand what you mean about height. 4 and 5 I don't understand the questions. 6. I'm not sure what you mean, but a partial answer may be that bump doesn't move the geometry (that's displacement). Bump changes the way the surface is treated as facing, so that it varies the amount of light received.

thanks