three.js reflectivity fresnel and focus

Question

I test the reflectivity and I see color and intensity % but I don't see how to config the fresnel % (materials become more reflective (similar to a mirror) when viewed obliquely and become dull when viewed perpendicular) and focus % ( concentration or spread of reflection on material)....

What is the difference between the shininess and reflection in three.js (because the shininess is a material with a little reflection intensity and focus for me ...)

thank to answers

Answer 1

ok thank I found on Nvidia tutorial a answer to explain the focus:

"When mipmapping is enabled, both OpenGL and Direct3D support a texture mapping feature known as texture level-of-detail (LOD) bias. Texture LOD bias can be useful to avoid unnaturally crisp reflections. Modify one of this chapter's examples to provide a positive bias for the cube map texture used as the environment map. This creates blurry reflections."

but I don't know if threejs include this ?