Hi guys!
Thanks for your replies and comments.
Carpet :
Indeed it definitely needs to be denser, but although I'm using 2x GTX560-Ti it slows down Blender big time, and eats up quite a lot of GPU RAM to render...
I need to find a solution for this.
Color of the alarm clock :
It can look quite unusual...
I tried with a plain aluminium-like material, but this red-metal livens up the scene - otherwise it's all too monochromatic... (grey/white/beige)
Floor planks :
Yep, I must have some kind of problem with the bump and/or spec here...
White blanket "torn" :
I'm not a digital sculptor at all, i.e. I'm struggling a lot with organic and fabric modelling.
So I used Blender's fabric simulator : a simple subdivided plane that I let fall on the bed.
But it looked to me a bit too bland and rigid, so I re-sculpted and stretched it a bit, hence the strange effect...
Tripod lamp - light above :
Indeed there's a strange "smoke" effect above the tripod lamp
=> That's probably because I didn't use IES for this, but just a lightbulb (a sphere centered in the lampshade)
IES of the bedlamp :
=> I used 2 horizontally symetric planes which I positioned under and above the lampshade, and applied the same IES to both. The lampshade is an emitter as well.
=> Maybe I should have used just one IES above the lampshade, and but a lightbulb centered in the lampshade?
(so I get a nice IES effect above, and a more diffuse light underneath?)
Thanks again for your kind and helpful comments : every time I post an image I feel like I'm improving, and that's thanks to you guys !!!