Thanks you so MUCH !!! Paride !!! Don't know if you're a women or a man anyway i love you haha. :D

So for short maybe it will help people later :

-the solution was to make 2 DayLights one with the HDRI Picture set as main --> texture and the other Daylight with the backplate on it set as visible ...

For me i still have a problem as i check "alpha channel" but even if kernel is showing what i want when i save the picture i don't have waht i saw inside the kernel ...

https://db.tt/jWALQ6QAAo

Hello paride4331 and thanks for your help

This is actually what i really do ... Proof picxture attached ... But once is i save my grey background is totally forgotten. And it's black instead ... Why ???

https://db.tt/jWALQ6QAAo

Link bellow will help you to reach a screenshot.

So basically i ...

I'm sorry but having to check "alpha" option if "Use viewport background is already checked" is a total non sense ! We should be hable to see the viewport background once "Use viewport background is checked".

And if we need an alpha for compositing purpose than wwe will check "Alpha channel"

I ...

@Golidsart I do exactly what you do, but in my case i also use an HDRI env picture as lighting method. So if i check both 'alpha' and 'use viewport background' i can see my background in the kernel BUt !!!!!!!!!!!!!!! Problem happen if i save that picture, the saved file is not what i see in the ...

I tried to do a picture today with Hdri envmap as environment lighting method. Than i checked alpha and use background .

So when i render within octane inside max no prob i do have the perfect picture with my grey background [ kernel is showing it].



But !!!!!!


When i save that picture the grey ...