I’ve been trying to bring in my own glb models, but I’m having some issues with collision. Check out this playground, once I hit a wall I’m done for 
https://www.babylonjs-playground.com/#D6UBC9
Is this simply an issue with my model? I’m using the Khronos giTF exporter from SketchUp. I was hoping to create a nice walkthrough for a house model, but first experiments lead to these weird collision issue.
Seems that was some issue with the code. I had no time to check your PG (I presume there is some mistake) but here is the PG with your model - https://playground.babylonjs.com/#4HUQQ#1482 , seems it is OK with collisions.
Thanks @labris ! I will look over my code again and see if I can spot the issue. 
[edit] It looks like the ground you added seems to be key to getting this to work. Maybe my camera/ellipsoid was somehow getting stuck in my model. Placing a floor under my model’s floor does the trick. This is totally workable for me. Thanks again!
[edit] After some further investigation it seems that the problem might have been in the way I was scaling my model. If I remove all scaling it works fine. I’m marking this as solved 