Try changing the lights.
Put 2 white lights 30x30cm 180cm elevation under two chandeliers.

<t>hi,<br/>
in version 3.4<br/>
<br/>
1) you have added the ability to change color to the sub-parts of the object (if already divided into multiple colors)?<br/>
<br/>
2) have you added an object snap point ?<br/>
<br/>
3) have you added an adjustable snap grid ?<br/>
<br/>
thank for your work ...

.

<r><COLOR color="darkblue"><s>[color=darkblue]</s><B><s>[b]</s>accepted recommendations<br/>
to improve the quality of the render .....<br/>
and tricks to change object parameters (brightness, transparency, reflection).<br/>
ps I need doors (minimalist design) better quality!<br/>
thanks<e>[/b]</e ...

<t>[google traslate]<br/>
<br/>
dear PUYBARET.....<br/>
I am an Italian designer home, you'll be happy to continue to develop sweethome3d rendering, but I think it is absolutely necessary to add these features:<br/>
- Adjustable snap grid (1 cm, 5 cm, 10 cm ....) to increase speed and accuracy<br ...

<r><IMG src="http://www.mediafire.com/imgbnc.php/6025079c9a4d451a0902bd0387c01006f287200b5061350a75b36ce38f300d774g.jpg"><s>[img]</s><URL url="http://www.mediafire.com/imgbnc.php/6025079c9a4d451a0902bd0387c01006f287200b5061350a75b36ce38f300d774g.jpg"><LINK_TEXT text="http://www.mediafire.com/imgbnc ...

<r>ITALY - Arzignano<br/>
Mini (living mq 18)<br/>
<br/>
<IMG src="http://download773.mediafire.com/s3qng9x6iypg/0g99uxi5chwmvi5/_mini_cucina.png"><s>[img]</s><URL url="http://download773.mediafire.com/s3qng9x6iypg/0g99uxi5chwmvi5/_mini_cucina.png"><LINK_TEXT text="http://download773.mediafire.com ...

Ma perché non introducono uno snap grid, in maniera da muovere con velocità e precisione i vari oggetti?

sto diventando matto con la collocazione di oggetti composti.... Esempio parallepipedi per creare i contro soffitti!

. Snap grid (regulable to 5, 10 cm...)
. change type design wall (inter axis quote is not useful to interior design)
. Copy style wall

(from italy - google translate)

I propose: "Render Multiple"
- Select various 3D views
- Set rendering parameters
- Select the folder to png files
- Start calculating all views rendered