<r>I have problem with YafaRay engine too:<br/>
when I start rendering, a lot of text is logged into the console and then nothing happens - nothing is rendered.<br/>
But sometimes it works without problems.<br/>
I think it gets stuck before it has log this
<QUOTE><s>[quote]</s>[16:33:14] INFO (+ 1s ...

<t>(sorry for my english)<br/>
<br/>
1) layers<br/>
- if you have more layers, then JTabbedPane with tabPlacement on top is not best solution (my opinion) - left or right will be better. Or, even better, special table (like list of furniture) - with column: name, elevation and visibility.<br/>
<br ...