Rich_Winsor

One easy way is to use 3D solids or slabs to create
the elevated tiers. You can change the Material to
carpeting to suit your needs.

Will using a Molding Polyline give you the effect you are after?
 

I didn't look at your plan, but based on your
image it looks like you have color toggled off.

 

Not sure what you are referring to. If you want to put a raised
edge on the flat portion of the roof just draw a line around the
edge of the roof plane in plan view and convert it to a Molding
Polyline or a 3D Molding Polyline. Then you can assign to it
whatever molding profile you like. Here I added an approximately
20cm x 20cm (8" x 8") border to the roof plane.
 

 
xxx

Here's a quick take.
 
No textures came thru with the plan so I just
changed the color of the siding material to
look more like your photo.
 
Changed all the cans to 60W Point Lights
and gave them a light yellow color.
 
Used pretty basic setup: Outdoor/High Quality/
Dark/No Blur/No Caustics and Default Image
Properties.
 
It takes a lot of passes to get rid of the grain and
there is still some bleeding but it should get you
headed in the right direction.
 
Left Image was 15 passes in 12 minutes
Right Image shows 46 passes in 30+ minutes
 
Edit: Oh yeah, I changed out the background
image too. The fireworks weren't doing it for me.

That's the way it goes Alex (r u alex?). I usually start out
by seeing if I can reproduce the look of a picture. During 
that process I often take liberties I probably wouldn't do
if I was modeling it for myself just to get the look I'm after.
Of course then when more feedback is wanted I have to
scramble to make the plan presentable.   I didn't go
as far a checking out how the model will frame because
at this point I would just be guessing as to the composition
of the walls. They look pretty thick in the photo. You might
have to fake some porch ceiling framing but the rest should
be straight forward.
 
BTW, I don't know who you pi$$ed off to get that scarlet
numeral -1, but I gave you a +1 to get you back to even.
Everybody deserves a fresh start now and then.
 
 
Edit:  10:40PM
Just tried letting Chief do the framing. Auto build a
foundation derived from the 1st floor and the have
Chief auto frame everything else. Looks pretty good
to me. That ceiling p-solid is only 1/8" thick so it didn't
really affect the framing. Just delete the 3 p-solids.
 
 

The default sun angle is controlled in the "Adjust Lights" dbx.
 

Not even a Tiparillo?   Hey, I was just whipping up a concept
sketch based on the roof plane configuration BeeoHat posted
from SletchUp. I get what you are doing by refining the concept
and positioning the hip rafters over appropriate structural members.
However, I am not sold on the idea that the "doglegs" in the hips
and valleys in your plan roof are present in the "as built" structure.
I could be wrong as the only pic is murky at best but my guess is
that all the hips and valleys are straight from ridges to eaves as
in the OP's sketch. That's why I just sort of split the difference
as to where the hip rafters would cross the upper railing beams
and let the roof overhangs fall where they may. No big deal,
I enjoyed the vids.

You're preaching to the choir here, Geir. From the basic layout of the lot terrain 
to the final aesthetic of the building façade, gutters and downspouts play an integral
part in how a design unfolds. Hard to believe they are given such short shrift here.