We have tested our models only on our FDM Core-XY printers, which are widely available consumer-grade printers. Models should work great also on FDM Delta printers and Resin printers.

We don't recommend printing our models on Bedslingers, as the Y-axis movement of the model generates a lot of wobbliness for models with thin trunks or 'legs'.

For materials - we have only used PLA, so that is what we can recommend. PETG might have much more stringing issues due to many retractions, as well as deformations due to warping. But if it somehow works out, the prints could be stronger. So it is up to you - the community to test it and let us know!

Run some tests:

1. Choose the model that you want to print and load it's STL file that end with '.._all.stl' into your slicer app. Then load in file 'Base.stl', and make sure that the asset model sits on top of the base model, make a group or assembly if necessary. Always print the models on top of landscape or other surface.
2. Copy the printer settings from the PDF to the model in your slicer app as closely as possible. You can use different settings for main model and the base (which can be printed 2x faster with very simple or default settings).
3. Run a test of print.
4. Keep an eye on the printer during the first prints to make sure that you can cancel the print in case of a model failing or bending.
5. If the print is successful, congratulations! You are set to print the most beautiful 3D scenes with our models.
6. If the print fails, the problem often can be found by knowing at which part the fail happened. In which case, you can troubleshoot and go to the Q6 in this FAQ.
7. Also, PLEASE be patient - it is very easy to overlook some small settings or faulty 3D model arrangements that make the small and thin parts of model fall like dominoes. We've done it ourselves plenty of times. Your printer needs to be tuned for working with very high precision, more than you need for everyday models, but if you get it right, these models might make your print really shine. Good luck!

One small tree can break off and lead to another broken tree that leads to a whole large print fail. Knowing that, we have optimized print speed, accelerations and other settings, to achieve fail-rate that is close to 0%.

1. Load the models chosen for your project in a (preferably) 3D modelling app, or your slicer app.
2. Arrange the models according to your project needs, make sure there are no huge overlaps of the models.
3. If the models are placed close, it is better if they intersect, but very little (meaning - have 1 or 2 spots of touching), because they can transfer stress of bending forces to each other and are much less likely to break (just like a chair with 1 leg can go off balance much easier than a chair with 3 legs or 4 legs). Just remember, that IF the models intersect, make sure to use settings to either 'fill holes' or 'fix geometry' in slicer app.
4. If using a 3D modelling app, export our models in a separate STL file from landscape, buildings and other parts that doesn't have so much overhangs as our 3D models. That way you can easily use different settings on different parts of the final print, without, for example, each time manually selecting 30 trees to adjust their settings in the slicer app.
5. Copy the printer settings from the PDF to your slicer app as closely as possible. As mentioned before, you can use different settings on different parts of your print, just make sure that our 3D models have the settings we recommend from our PDF.
6. Run the slicer and check if the models have been put directly on the landscape surface and there are no layer gaps.
7. Print!

A forest or other random tree and plant arrangements mean that there most likely will a lot of chaotic model intersections. In such cases, it is almost impossible to fix overlapping geometry in the slicer app and the model is left with random holes and geometry hanging in the air. So the short answer is - not in a simple way.

To optimize such complex geometry in a single printable model takes various 3rd party tools and a lot of processing power. And even then, these 1000s of small optimizations can just crash if not manually adjusted.

We say that from first hand experience, because we do similar work for each model that we publish, and we have also built forests just like the one you can see here.

If you have a custom project that you feel we might be able to help you with, like parts with dense overlapping nature, or other hard-to-print structural prints with overlapping geometry, we are also available for hire if the schedule is not too tight. You can contact us with all the relevant info on citylab.lv@gmail.com and we'll let you know if we have some solutions in mind!

The best way to diagnose the problem would be to find the moment that the print fails, because most of the time there is a visible clue.

The clues could be:

1. Branches warping upwards and being hit and bent with the print head.

2. Print breaking off on early parts of printing overhangs.

3. Uneven layers leading to material build-ups or holes.

Possible solutions:

• The print should run on low speeds, so especially if these are your first prints - before anything else, please make sure that the speeds and accelerations are set according to our PDF.
• Bad quality or wet filament prone to warping - try different filament.
• Print gets exposed to cold air - use enclosure and minimum exhaust fan speeds.
• Although unlikely, but over-extrusion and under-extrusion can be an issue if it is off by a large margin - always better to calibrate the filament for printing.
• As a general rule - make sure that your 3D printer is calibrated, in good working condition and maintained according to the manufacturer's guidelines.

Occansionally a single print might fail just because of a slight random over- or under-extrusion of the filament at the wrong place and wrong time, or because of the randomness of travel movements accross different prints and different slicer algorythms.

When the failing is consistent, and you've done everything according to our previous recommendations, please send us an email to citylab.lv@gmail.com letting us know:

• your printer model
• filament details
• at which point the fail happens
• a photo or video of the failed moment of the print

We will give our best opinion about what the issue might be.

Unfortunately, that is not how things work with digital products. For that matter we have also created free 3D models, that you can download and test before purchasing any of our paid models.

We recommend printing the 3D trees from our free Architectural Trees BASIC Pack #3 with which you can evaluate if your printer will be up to the task. So before purchasing the paid models - just make sure that you are able to print the free models first!

We will have that option available soon in your profile settings, but for now we do that only manually, so please send us your Company Details from the same email which you used to register your account to citylab.lv@gmail.com, and we will set VAT exemption for purchases from your profile.