Question related to MultiSubObject and Performance.

[bioclone_ax45]

Hello one (i believe) simple question but I dont know how to look for it, the thing is If I would be having a MultiMaterial with 50 "slots" where 40 are empty and 10 are used (submaterials) the performance would be worse than having one MultiMaterial with only 10 submaterials but no "empty" slots?

I do use a simple MultiMaterial as a big pallete first (50 mats) but later I want to use a new Multimaterial containing only the required colors/materials for certain groups, so lets say only 10 of said 50...  Obviously a new one based on 1-10 would require changing all material IDs, and would want to skip it if the performance is similar or there is no impact... But I am not sure.

[casey_hawley]

If I understand correctly, no, you would not have to change all of the IDs on the object. The ID number is arbitrary, meaning it can be whatever number you want (1-1000) and they do not have to be consecutive numbers either. 

The only thing you would need to do would be to wire/connect the required sub-materials (as instances) to a NEW multi material and set the IDs in the Multi to match what is set on the object, then apply the new multi.