You can download 3D Warehouse models in the Sketchup format, open them in the Sketchup software, and then export them in the “Collada” file format. You can try this software free for 30 days. If you want to use these models that have no Collada available, you need to use the Sketchup software. Now, for some models there is no Collada format available - only the Sketchup format. Unfortunately, Sketchup 3D Warehouse made some changes in 2021. Make sure you select the “Collada” file format if it’s available.
You can find excellent 3D Models of buildings at Sketchup 3D Warehouse. 3D Warehouse (this is no longer a good option) į offers 17.000 3D models, some free, some paid. Please make sure you have the most recent version of FWsim in order to use Sketchfab models. The models on Sketchfab work very well with FWsim, and many of them are created from real photographs. You can find a list of supported file types below. Physically based rendering (PBR) models are not supported. However, certain restrictions apply: You must pick models that have relatively low polygon count (also called “low poly”). FWsim allows you to import many of these 3D models, and then place your fireworks around them or on them. Many places on the internet allow you to download 3D models.
