stabilityai/stable-diffusion · 3ds max - render+alpha / using stable diffusion for the environment

Hi All,

Im a very new to stable diffusion, more than this is being a noob. I use 3dsmax in my every day work and would like to introduce SD to my process.
Especially for environnment and vegetation. The main idea behind is to reduce time, polygones & headaches. I was wondering if there's a way to:

Launch stable diffusion
Load my 3d render img
Load my alpha img (ie environment behind the building)
Tell a story like -> european forest in summer
Generate a result only in the alpha/mask area to get a european forest in summer behind the building

Is this could be possible?

thanks in advance & good week end to all

dvg