Questions on lighting

What is the common/best use for casting a shadow on furniture?



Can anyone tell me the different/ideal usage of the type of texture? ( Diffuse / Specular / Bump / Opacity)



Are there any recommendation of good tutorials/blog post on such matters?


Please help.

Thanks!



I didn't find the right solution from the Internet.



References:

discourse.mcneel.com/t/questions-on-lighting-texture/36612

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