Taking too long

[klipanos]

Did you turned off cast/receive shadows and visible to reflections/refractions options for that plane, or is it sitting between your enviroment and your subject and blocking most of the light?

I just put it between my enviroment..

[klipanos]

I 've placed a plane and a bitmap ... i do this often to match real outdoor for the living space i make the render... this particular is a photo taken from the balkonie of the house..

How did you do this? What kind of material did you assign to the plane?

Very simple ... i made a corona mtl and putted the jpg...

So this is probably the cause of your problems.
And how did you make it glow? It clearly glows in your renders.

To do this properly you should use CoronaLightMtl with your bitmap and "emit light" disabled.

I have the sun directly hit it... i used a corona mtl and nothing else...
I'll make some tries to see what happens and if this is the problem....

[romullus]

Did you turned off cast/receive shadows and visible to reflections/refractions options for that plane, or is it sitting between your enviroment and your subject and blocking most of the light?

I just put it between my enviroment..

So that's why it's taking so long.

[klipanos]

Oh my god!!!!!!!
So you say that i must turn off shadows and visible to reflections .....????
i must finish a bathroom that i'm doing and i'll give it immediately a try!!!!
Thank's Guys!!!!!!

[Ludvik Koutny]

No, turning of shadows and other visibility settings is still quite inefficient way. Use CoronaLightMTL with disabled emission for your background planes. That will give you best performance.

[klipanos]

Thank's Guys!!!!!!
It realy was like magic happens!!!!! i putted a coronalightmtl with disabled the emission and the total time dropped dramaically!!!!
In 45 minutes and 2000x1120 resolution i have this result!!!! which is a very nice time!!!!!!
The others would take me at least 2 hours to reach this results!!!!

 

[JoeVallard]

I ran into this problem just the other day. 

I used a plane a good distance away from the buildings, a place a cloud bitmap on them. For a BG and to cast reflections. The problem i had was no matter what material or settings i tried, it always changed the lighting. 

The first picture was render with the cloud plane.
The second picture i rendered without the cloud plane, and used a material id/alpha to mask in the clouds and reflections on the windows.
Notice the huge difference in the lighting and shadows.

Things I tried to get it to work in the render.
Corona Material with a variety of combinations, Translucency, Opacity, and Refraction.
Corona Light Material with and without Emit Light on.
I even excluded the plane from casting shadows.

Everything resulted in the place changing my lighting and shadows. It however did not increase my render times and noise.

My advice try a render without the Background Plane and see if it clears it up any. Maybe even try a render without the glass too.