<r>THIS IS SOLVED! omg. THANK YOU!!<br/>
<br/>
yes, i lost the 3D-view while placing a shelf in a corner. but it snapped on a furniture nearby and the 3D-view was gone in exact this moment... here is what i done according your solution:<br/>

<CODE><s>[code]</s><i>
</i>bash$ grep NaN Wohnung.sh3d ...

<r>hey guys.<br/>
<br/>
i lost the 3d-view while editing my model. everything was fun but after adding a shelf the 3d-view got lost and now i only see a gray area and i have no idea how to step back to a working file.<br/>
<br/>
i use ubuntu 16.04.6 with SH3D v6.1.2 (Java Version 1.8.0_202 - 64bit ...