@pixelcruncher huge amount of job! well done!
I am wondering if this is possible to assign a map/option for "opacity" of the materials. so that I could make a perforated metal sheet i.e.?
Also I may not be able to imagine that a metal/mirror material is emitting light.. is there any real-life example?

@pixelcruncher I was going to prepare a car paint material pack and thought it would be nice if I could have my custom material preview, nothing serious.

@pixelcruncher if I could load my model/preview, or knew how to or where to place it manually, it would be more than enough for me. It is not something in demand that much at this stage I believe.

@Rich-O-Brien Thanks a million. I am wondering if there is any way to have a "custom" preview (model) instead of the default sphere.

@L-i-am Man, This is enchanting. Thanks for sharing.

@Bryan-K Thank you mate and here is the other design.

I am thinking of changing the building design... maybe to a more pure form.

Thank you mates,
The same approach, another example. Just adjusted the level, so that the darkest point is not 100 black to match the distance and made a customer brush to erase the lower part so that matches the landscape:

@Rich-O-Brien thanks, and were exactly they will be saved?
I will share my screen, as it is slightly different.

I am wondering is there any way to save the materials I make, locally?

@pixelcruncher it seems that the HDRI image is also pixly, so maybe adding an "upscaling" option to make low-res images, smooth, would be nicen

@Mike-Amos This is the fine potential of RayScaper...only 7 percent of total progress...

@tuna1957 This is another shot. I reduced the environment power so that we can see it is blue, then added another blue color directional light to compensate for it. this is an experiment yet not final.

@tuna1957 The model is not mine, I have adjusted the model, added some details, and adjusted the textures based on an image I had from the real place...
Thanks for the compliment.

@Mike-Amos This is a blessing.
BTW, I guess bkz of my age they refuse me.

@pixelcruncher @L-i-am ; thank you mates for keeping me motivated. I have been hardly battling to keep motivated and stay.
I am applying for any relevant job, Architecture, CAD technician, BIM, 3D modeling and visualization.... and now feel bone tired.

I am getting depressed, so many rejections every day are devastating. I am planning to get back, if cannot find a job in next three weeks.

@jo-ke Besides your modeling skills it shows the importance of assets in bringing the model to life.

@L-i-am mate,
This is for myself, to feel I am useful.
You know, I am constantly applying and got only 3 interviews. Then, I was rejected in interviews, so I doubt if I am not useful

Try this also, This is low poly but needs a better texturing:
https://3dwarehouse.sketchup.com/model/d030d25b-e1a4-4282-8886-50c7ae21c68c/square-piped-cushion