<r>Many thanks for your help, Keet.<br/>
Indeed, applies to my wall, the semi-transparency is effective.<br/>
I don't knw that it was essential to active just 1 step of transparancy in the 3D view, I just tried to apply this in opaque mode.<br/>
I de-activate 3D transpaency, because (I don't know ...

<t>Sorry but I've somme difficulties.<br/>
I've tried to generate many PNG with transparency, but each time it appears black or grey, but never white. And the transparency is not effective.<br/>
Which parameters should I use on the 2 sides ?<br/>
Angle 0 ? Scale 1% ?<br/>
You may have a correct PNG ...

WOOOH KEET
Thanks a lot for those tips.
i will choose the second solution and try to apply a semi transparent PNG.
Have a nice day !

Bonjour le forum !

Je souhaiterai rendre mes murs extérieurs semi-transparents, sans pour autant utiliser l'option de "Modifier la vue 3D" où je veux rester en opaque.
Est-ce possible svp ?

Merci par avance pour votre aide.