One lightmaptexture was loaded to pbrmaterial in my code, when i tried to change the corrdinatesIndex, it didn’t work, nothing happend to texture UVs. How to activate this property?
We will need more details about your scene to help you, but in the meantime you can check how I did in this scene: https://playground.babylonjs.com/#ADPQFC#9
Please check my scene: https://playground.babylonjs.com/#ADPQFC#116
Hmm I don’t understand where the issue is 
Here I tried to access coordinatesIndex through materials, and also just switching from 0 to 1 ('cause meshes in this playground only have 2 UV chans) but it doesn’t fix the thing:
https://playground.babylonjs.com/#ADPQFC#117
The coordinate index is currently not smthg dynamic: https://playground.babylonjs.com/#ADPQFC#118
let me take a look if it is easy to address but as it changes pretty much never in code I all go for perf first
OK, I was just succeeded by… cloning the texture, but not sure if it’s good for VRAM 
https://playground.babylonjs.com/#ADPQFC#119
[edit] fixed using sebavan dirty trick 
https://playground.babylonjs.com/#ADPQFC#120
Thanks sebavan!
that’s a good way, just need to dipose the last texture
nw it will be fixed in the next nightly in about 1 hour