Since Poliigon no longer supports the specular workflow, Lumion users may find that they'll want to update to at least Lumion 2023, which supports a full PBR workflow.
Lumion Support
Textures: Full PBR Texture Support (Available from Lumion 2023)
Models: .FBX Support
HDRIs: Full Support
How to import Poliigon Models into Lumion
To import models into Lumion, make sure you’re first selecting .fbx as your download format from Poliigon. Then follow these steps:
While in Build Mode > Content Library, click on "Imported Models," and then click on "Place".
This will bring up your Imported Model Library. Simply click on this button to import your model:
The model will snap to your mouse in the viewport. This lets you place it in your scene. You can do this once or keep placing it by left-clicking. Hit 'Esc' to exit placement mode. You can switch placement modes from single to line. This lets you place several models in a straight line.
You can view Lumion’s full guide here: https://support.lumion.com/hc/en-us/articles/12193299343260-Importing-and-Working-with-3D-Models
How to import Poliigon PBR Textures into Lumion
Here's a great video from Architecture Inspirations on how to import Poliigon materials into Lumon.
To import Poliigon textures using Lumion you can follow these steps:
To import materials into Lumion, first select the model you want to edit. Click on the material tab, then click on the object.
To use a material preset from Lumion’s library, just click on the ‘Materials’ tab. Then, browse through the categories. To import a custom material, select the ‘New’ tab. Then, go to the ‘Settings’ tab at the top of the window to access the individual inputs.
Click the blank square next to the input name. When you hover your mouse over it, the text ‘load map’ will appear.
Please note that Lumion expects a normal map in the DirectX format, but Poliigon provides OpenGL normals. To fix this, click the 3 dots at the right edge of the window for the ‘Relief’ (Normal) input and select “Flip Green Channel.”
Lumion supports displacement maps. However, it’s important to note that it’s not true geometry displacement. Instead, it uses parallax displacement.
Additional inputs such as opacity and subsurface settings can be found in the ‘Properties’ tab at the bottom of the ‘Materials’ window.
You can view Lumion’s comprehensive guide on materials here: https://support.lumion.com/hc/en-us/articles/7764034284188-What-do-the-properties-of-the-Standard-Material-mean-in-Lumion-2023-and-newer
How to import Poliigon HDRIs into Lumion
How to import Poliigon HDRIs into Lumion using Real Skies
The easiest way to use Poliigon HDRIs in Lumion is to enable Real Skies. Lumion ships with a selection of Poliigon HDRIs available out of the box. Click on the ‘Weather’ tab of the bottom navigation bar, then toggle the ‘Real Skies’ option:
How to import Poliigon HDRIs as a custom HDRI
If you wish to use a custom HDRI, you’ll first need to switch to “Photo” mode, on the left hand navigation bar. You can then load your image using the folder icon:
For the best results, Lumion recommends using exterior HDR images with the horizon in the middle of the image.
You can view Lumion’s full guide here: https://support.lumion.com/hc/en-us/articles/360003474993-How-do-you-replace-the-sky-with-a-photo