i just use lamp-case inside the cabinet that looks glow a bit.. and i don't need to light the cabin inside.
But anyway this problem is being resolved
- background diffuse color is changed to 180,180,180
- rendersetup is reseted to default
- disabled caustic material on the glass lamp-case inside the cabin
i do changes on my another item (similar). the noises is so much reduced, but they're still there a bit and the accuracy isn't good enough (next chance, i'll try to fix it with expanding the rendertime).
then i have another question according to "
https://corona-renderer.com/wiki/performance_debugging". Do i have to change the corona light color to 180??
thanx again Maru!!