I would like to use EXR maps (fake interiors) in Twinmotion, as we can do in unreal engine. 'wParallax' availlable in the UE marketplace is an exemple of custom shader i would like to import. How can I import a plane with this kind of shader (as uasset for exemple) in Twinmotion ?
At this time, Twinmotion doesn't support importing .EXR files or .uasset files. You would need to convert these assets into Twinmotion compatible filetypes in order to import them into your scenes.
The parallax windows feature is on the roadmap so it will probably be implemented in the upcoming releases. Happy to let you know that MacOS already supports Lumen.