Lighting and rendering details in Rhino

This would be a good time to test lighting and camera setups because the model created from the simple test commandscript is low surface count model. You can move around in it and render the model easily. Check out the images below to see how I developed the current lighting. After figuring out the best light scheme I saved only the light set up to file, combined that as a file merge in a script and tested that on the higher more detailed surface count model script.

Command scripting really helped here because I was able to test various spotlights on all aspects of the file. This will help because I can now judge where it needs to be lit for export too. When I liked the arrangement of the lights I highlighted the lights and exported them as lights 01.3dm I than opened this file and purged the empty layers and bitmaps and resaved it. I created many light files until I found one I liked.

Reminder: The Scale of your model affects the outcome of rendering in Rhino. Because your units for these exercises are set to No units, Rhino assumes the model is really small. The default rendering setting for shadow offset in Rhino is set to .75. Shadow offset is how faraway the shadow is from the shadow casting object. In this tutorial because we are really pretending to work in meters .75 of a meter is too far away from the object to start the shadow of that object. Tighten up the tolerances by making the shadow offset smaller. Set it to.2 . Please make sure your rendering settings are always set to jagged and faster never use smooth and slower or custom for any of this final tutorial.

Because Rhino doesn't support advanced rendering features I could only use spotlights of varying intensities and colors. I used the large bright light as the main sun shadow casting light. I introduced the fill lights to solve certain problems. Notice from figure 2-4 how spots solved the darkness of the foreground columns and as a bonus lit the inside of the Oecus. The other colored spotlights simulate radiosity and help lighten the rest of the Peristyle and Entablature. There is one last thing you need to make in Rhino to get a good rendering. It does not create many polygons. You may notice that there are light leaks between surfaces that are not joined when you render these surface in Rhino, see Lighting Figure 1, this is easily solved by creating a light shield around the model. I have already made this for you.

Lighting Figure 1

Main spotlight emulating the position of the sun. Notice the light leaks at numeral 1. You can see my geometric position and size of the spotlight in the plan views to the left.

Lighting Figure 2

I added two blue fill lights to solve the problem of the utter darkness on the sides of the Peristyle.

Lighting Figure 3

I added three more lights one blue, purple, and green to illuminate the front facade of the Oecus.

Lighting Figure 4

Here I added three more lights near the camera viewpoint to relieve the darkness in the foreground. As a bonus the final lighting not only lit up the foreground columns but the inside of the Oecus in the background as well.
I also added the Lightshield so that light leaks would not occur. You can see the Lightshield I added in the plan views to the left. You can see the settings  for the individual lights by opening the lighting file ...

! merge