After render, inner cavity of box is dark

Hi, i am trying to get the cabinet inside to be bright( without grain) and the inner material(white) is suppose to be glossy with a light reflective. also the edge should be be define.
but i could not get the effect i am pleased with. please help.

here the link to file:

Hi Bob - the rendered display mode is a ‘cheap’ openGL preview, it does not calculate lighting in the same way as the full renderer or raytraced viewport - the latter may give you results you like better however -

This is with the default ‘Studio’ HDR as the environment pumped up a little and rotated to direct more of the light into the box-


thks Pascal, i will try with this setting.