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.

Thanks for a good words, we just upgraded for version 2.5, now brdf's have got its own colors.
http://www.brighter3d.com/blog/

Best Regards,
brighter3d

Faster "save all textures" from the api.
It would speed up all renderers export time...

Best Regards,
brighter3d.com

@unknownuser said:

What render engine you have used?

http://www.brighter3d.com ...

My 60 seconds render...

Scene by Mufti Arifin,
Rendered in 11 minutes.

Yeah, sorry :
http://www.brighter3d.com

We have a better, improved interface,
streamlined and easier to use. Included with this new interface is an
embedded help system – you can use the question mark button to get instant
helper popups explaining the function of every button or field of every
interface window.

But the real hot improvement is in the (again) Material Editor Window. As
we strive to enhance the tools for realistic renderings, we added many
material presets, based on real life objects! You can get up to 100 presets
in PRO version, and 10 in the FREE one. These presets were created by
scientists by scanning and digitising real materials, resulting in over
100MB files per each material. Then this big chunk of information was
transformed in highly accurate mathematical functions, and thus were
created amazing profiles which you can now select from within Material
Editor.

Also, an amazing new feature is in the Lighting process. From now on, you
can create a light – an emitting object, adjust power, orientation,
colour temperature, accent etc. and then HIDE it. The light will affect the
scene and will compute, but the emitter itself will not stay in the way of
the viewer! Thus you can create excellent, realistic light compositions,
much like the photographers are compositing in a real setup with nice
accent light and effects. As it is said, the succes of a photo is 80% due
to its lighting composition. So, now, you can, too, create stunning
renderings, product shots, interior designs – like a true PRO.

Last, but not least, we have good news for PRO users, present, past and future.
We decided to give free updates, forever. Yes, that’s zero costs for future
updates, even for major versions. So, for you new users of this excellent
render plugin, grab your wallet (okay, your CC), and buy now the amazing
new PRO version of Brighter3D!

We updated Brighter3D to version 2.2.0, which works natively in 64bit, just like SketchUp 2015. When installing, it automagically chooses 64bit or 32bit, according to your SketchUp installation, so you’ll not worry about that...

Maybe you are right...
For people doing renderings 2015 is first professional version (thanks to 64bit and possibility to use whole memory).
From the other side v8 is last true free version (according to the license)...

Do you know any recent statistics on SU versions usage?

@unknownuser said:

You can use DL which replaced Win32API.

I still try to support SU 6 and 7...