Thanks for your tests EnkoNyito. I think I'll simply try to improve the meshes on the model of this dishwasher in a future version of furniture libraries. If you or other users see some similar problems on some models available at the free 3D models page, please tell me so I can check them too.
I'll make some additional tests on [font=courier new]adv_min_raydist_value[/font] parameter, but feel free to make the adjustments you feel the best in your plug-in.

About the visibility of meshes in indirect rendering, sorry I have no idea at the moment. Maybe you could ask to the developer of YafaRay himself...