I have done some experimenting on the Radiosity quality settings (Settings/Radiosity)
Do you mean Settings/ProgramSettings/Rendering/RadiosityOptions? If I'm on the right page, what does Update Display Every nn Steps control? I can't see any effect after changing this.
What does Image Brightness do? I read the Help and understand that it overrides the 3D camera settings, but should it be set to some value to get the type of light reflections that look so good in your drawings?
This was set as just a room with 7 lights of 60W each. Daylight was turned off to make the renderings quicker and there were no windows anyway. The lamps shades were grey and they were custom set to 90% Transparent to give light onto the ceiling and 10% Emissive so that the shade was still visible. These custom settings are found by right clicking the light, select Properties, Appearance Tab, clicking the colour swatch and the colour swatch again, then ticking the Display Setting Details and moving the sliders. (See second image)
OK, I see the lights in your drawing and I see where to turn Daylight off in the Radiosity Options. But I don't understand the rest of this paragraph.
Are the transparency percentage and emissive percentage characteristics of the particular lamp you chose, or is that something I should be able to manipulate using a 4" Recessed Light from the Ceiling Lights in the Catalog?
Right clicking the light fixture (in my case the 4" Recessed Ceiling Light) and choosing Properties then clicking the Appearance Tab gives me a list of Components and Options to change each of the ones listed (fixture, light, 2D symbol). If I choose the Component 'light' then click on the color swatch in the Materials group, I don't get the chance to click the swatch again before I get a Material options panel with Filter, Groups and Materials options. I see nowhere in any of those three groups of options that I can tick Display Setting Details and/or move sliders as you describe.
When you refer to the 'second image' are you referring to the second drawing in the jpg file?
As you can see, I'm totally lost when it comes to controlling lighting in renderings. I lack even the basic vocabulary to ask questions; so please understand why I described my results as specifically as I did here.
TIA for any 'light you can shed on this subject'