I had never heard of greebling, but it puts a name to my favorite thing to do and look at on the internet.

The website tips and bricks summarizes the technique well...this site is so good and informative, recommend looking up the tips on greebling..there are 2 posts

Lego has used this technique and I never noticed it's even on newer set boxes..both star wars and city sets!

I never noticed the presesence of greebling on the box until I lifted the At-At to look closely at it. The box art was more visible up close

Additional examples are present in lego sets

The bigger the model, the more greebling is needed to add visual interest.

My favorite example of greebling is in the y-wing style star wars models. Different versions of the y-wing ship are present, although I'm not sure that all the ships are actually y-wings. Regardless, the style of the mid part of the ship is where I wanted to focus. The more simple sets show details, but not "super" detail/greebling

In the example above, the 2x2 tile with center stud really adds complexity just with one piece! That piece is so good to use, when it came out, it was mostly in the heroica sets and city games so I tried to snatch them up!

Some of the greebling appearance above is created by decals on the lateral white cylinder pieces. Although decals create the illusion of complexity, I wouldn't consider it to be actual greebling.

Above: Average detail present with use of brown pieces

Above 2 pictures: good detail and I never have seen brown pieces matched so well with gray! I think this is great greebling

Above: Very minimal greebling without much visual details, easier for smaller kids to build (or slow adults like myself!!!)

And the best greebling on this type of spaceship that I could find on Google photos (by pure luck) is a moc below from the site "Brick Vault" (2 pics below)

Source:brick vault

Excellent greebling...I love this esp the use of grey tubing that usually isnt seen, esp in space hangar dioramas where the greebling is in the wall parts.

Finally, the largest set of all time (at that time) was the Millennium Falcon. The detail from greebling is fantastic, love the bars on the top of the ship.

There are just so many good examples from official lego products and the internet...one only has to type greebling lego in the search bar and be amazed. The final example of extreme greebling is the scene below

I don't think I've seen a bigger example of greebling, credit from both pinterest reprint from Flickr....original builder was Marco Bass. Further info in pic above

Greebling has to be the most fun technique as it incorporates art. Sometimes a trial of putting like color pieces together turns chaos into a great build/piece of art!!!

I had never heard of a train bogie before.

It is the wheel component of a train...

From google images and http://www.railway-technical.com/trains/rolling-stock-index-l/train-equipment/electric-traction-control-d.html

There are multiple examples of these in lego train sets:

So the bogies above are good illustrations in black of train bogies. So, this is just meant to be an educational post "for dummies" like myself. Also when typing bogies, make sure the keyboard doesn't automatically correct to bodies!!!

I bought some of these on pick a brick but there werent axles so the rep at lego sent me some which was kind...just know that you need axles for the wheels