Hi Omar, thanks for your help!
Now, I have combined multiple b3dm file in a single tileset.
My issues is:
I'm so confused about what is the best way to batch buildings into b3dm files. what I'm doing now is Collada->gltf->b3dm. => for now my b3dm file just contain 1 model.
I want my b3dm file contain multiple and I can add extra data to its batch table header json so I can get that data when I have onclick event on each model in my b3dm file and I find out that batching multiple models to a single b3dm file can improve rendering performance.
What I want to do is batching multiple models not only one model to b3dm file with batch table json identified by batch_id to improve rendering performance.
I found that have 2 way to do that by batching at glTF level or batching at b3dm level (not good from the performance perspective) so I want to find a way to batching multiple models at glTF level but I dunt know how to do that. I'm stuck at this point :D and I need your help!
Thanks again Orma,