I am using Fiddle to run C++ GUI code from SketchUp Ruby,
on Windows everything is fine.
On MacOs I found a problem I can not solve by months.

After window is shown (by first toolbar button) for the first time and closed
most of the SketchUp "Window" menu items get disabled.
It gets disabled right after window is shown and do not get enabled anymore (even after window is closed).

It looks like this:

Also when you try to do the same again (show window) by the same first toolbar button, window is not shown again, and there is no button event on the ruby side (even when you click the button).

It looks like a SketchUp is broken in some way by using c++ GUI window (event loop maybe?).
It happens not only with FLTK but also with other GUI's like:

• Coocoa
• OpenGl
• Nuklear
• ultralig.ht

Minimal test plugin:
Test plugin

XCode source:
https://drive.google.com/file/d/1exFrLjjPIBqwQA3XfsPQCIjVgltV8qLO/view?usp=sharing

Any help is appreciated...

User LeonF ask on the SketchUp forum if something similar to the image posted by him:

can be made within SketchUp.

Then he post a link to a model.
I downloaded it and rendered few quick shoots by Brighter3D.

Then I made this video tutorial to show you how you can do it by yourself:

I can render you image like this (rendered in brighter3d) in minutes if you share the model...

Quick setup with brighter3d 2.6.2

@unknownuser said:

There was a trial version available for free yet we found we were dealing with people trying to crack it. This I can not allow, it is stealing! So for you honest guys, I apologise.

We did at brighter3d.com following:

• FREE version does not contain all features (and can not be cracked)
• PRO version is one time payment with free lifetime product upgrades at affordable price

And it works!

Indeed it was a long road, but you Users drives me to improve it.
Anyone remember version 1.0 beta from 2012?

5 minute tutorial, how to use Artificial lighting, Sunlight lighting and HDR lighting.