Thanks Mike,
i struggle with details and especially with the light in rendering animations …
Try to understand why certain lights in IndigoRT suddenly turn brighter or darker.

have found the topic "Rename Materials" and the posts there the problem was mentioned in 2013:
http://sketchucation.com/forums/viewtopic.php?f=323&t=47234&p=482611&hilit=rename+materials#p498542

Hey, Thomas is a superstar for me (and you too) and i think, he knows what he coded in 2013. My problem, when i use an old plugin..

Its a plugin: TT_materials_renamer.rb
After disabling the problem was solved.
Thanks again!

Thanks for your help! This method may take a while.
I was able to use the model backups to find out when the problem occurred and what plugins I had installed or updated during that time.
There is no relation to it.
The conversion of the material names takes place directly during the program start.
Which plugins are already active in the launch of Sketchup?
Have only now (unfortunately too late) found that I can undo this action after starting the program ...

For some time, the following happens:
After opening a file in SketchUp Make 2017, all materials are automatically renamed.
All materials will be renamed and numbered from the immediate opening of the model from "mat000" to "mat ..".
I can not find the cause: a thoughtless presetting; a plugin that operates secretly ???
Unfortunately I only realized after a long time of acceptance that I could have done an undo after the start.
Approximately 400 materials are now stereotypically numbered - painting by numbers ..
Any help or information is very welcome.

Here is an attempt to summarize the essential components of the simulation very briefly. In complex MSPhysics simulations, it makes sense to separate the collision geometry from the visual geometry ...

Well done! Complex and simple at the same time. A good example of using MSPhysics.

Cool design, carefully modeled!
Would like to let it fly ...

Playing with the architecture - from scaffolding character to more organic shapes in the exterior dungeon of the buildings.

Never saw anything like this. Seems to be something completely new ...

Yes, and there are a few more things you can do with MSP scripts...

My recommendation is MSPhysics with its endless possibilities of camera settings:
http://sketchucation.com/forums/viewtopic.php?f=323&t=68975

Cool! Would be great to let it start and fly ..

Usefully links are in the first post of Antons_S MSPhysics topic:
http://sketchucation.com/forums/viewtopic.php?f=323&t=56852

Outstanding work!
Fortunately, the condition of the road has not deteriorated significantly in the 40 years.
Even the cool smiley on the suspension of the overhead line has held ..
Are you doing the job for fun or as a small contribution to urban planning in your city?

Great work!

The animated tree branches are components extracted from trees, which in this case can be copied arbitrarily and generate a servo joint with a MSPhysics script, wiggle and react to passing copters.
The large blue box in the GIF is the tree dummy with witch all branches self connect.
The GIF shows most of the active simple physics geometry. The geometry to be rendered is too complex for the calculation and is therefore physically ignored. Most smaller objects outside the camera's field of view are hidden. The rain simulation is not shown here.

Thanks for the encouraging words!
An animation in the NPR style is my goal. The picture in the first post above is a single frame from an early stage.
There are still missing animated people, other animated objects, lights, etc ..
For the finished one-minute film with a few camera shots, both of my computers each need about 1 week of computation time with an average of 6 minutes of rough rendering per image (1920x1080 pixels, indigo RT).
Next, four movie layers are superimposed in the video editing program - SketchUp Lines-and-Colors, pure rendering, and two graphic layers created with FotoSketcher from the rendered images.
Several filters are used for the overlay then ..

Here's another attempt to get a 3D Warehouse model up and running.
And so I continue to try to simulate upright walking or running with SketchUp and MSPhysics.
Never thought that would be so complex and all parts have to be adjusted exactly..
Mass of body parts, speed, position and programming of the MSP joints, damping, frictional resistance of shoes and ground - everything interacts sensitively.
Running and jumping movements are particularly difficult as the feet tend to break through the ground.
The MSPhysics joints reach their limits and centrifugal forces or shocks, for example, cause the feet to swing out of their imaginary joints.
Falls and fidgeting on the ground are not uncommon during the test runs..