Hello again,

I would like to ask if it is possible to remove collision from mesh in NifScope?

Thanks in advance

Yeah, just delete any RootCollisionNode blocks that exist then right click the top node and select {Block->Insert->NiS...->NiStringExtraData}. With the new node selected find the "String Data" line in the block details window and put "NCO" into its value column. After that just select the node you want to remove collision from and put your new nodes index into its "Extra Data" value column.

I just looked through the nif and there seems to be no RootCollisionNote in the mesh. Is it possible that the mesh has collision even without the node?

Yes, if there's no collision node then the engine will use the mesh geometry itself as collision.

Added the extra data node and it works like a charm, thanks a lot!