Ahh I see, sorry I'm definitely in no ways knowledgble in this subject I've just started 4 days ago haha but there was this tutorial that I saw where they uploaded a whole mesh body with rigging in one piece, so I had thought I am able to do that as well with a low poly and smooth shaded mesh? I tried uploading a head first and it worked, but yeah definitely not sure about the body and the inner mouth. But yeah I meant decimating the mesh itself into lower polys I'd had to at some point anyway its lagging my PC as well
As for retopology, Imma just procrastinate and leave that uhh off for another day XD all of these technical terms and skills are over flooding my brain ;-;
Ahh also, on a side note, does Blender's rigify addon work with SL bone rigs? I am not quite sure.