Revert "Revert "Performance tweaks""

BatchRenderer/AssimpStrategy/RtbAssimpStrategy.m

...bioExamples/Car/Models/Mercedes SLS/234307--27048016-.tga

.../IsetbioExamples/Car/Models/Mercedes SLS/bumper_frame.tga

...s/IsetbioExamples/Car/Models/Mercedes SLS/carbonfiber.tga

...Scenes/IsetbioExamples/Car/Models/Mercedes SLS/credit.txt

...Scenes/IsetbioExamples/Car/Models/Mercedes SLS/engine.tga

...enes/IsetbioExamples/Car/Models/Mercedes SLS/exported.mtl

...enes/IsetbioExamples/Car/Models/Mercedes SLS/exported.obj

...IsetbioExamples/Car/Models/Mercedes SLS/grille1_alpha.tga

...IsetbioExamples/Car/Models/Mercedes SLS/interior_lod0.tga

...s/IsetbioExamples/Car/Models/Mercedes SLS/lights_lod0.tga

...IsetbioExamples/Car/Models/Mercedes SLS/nodamage_lod0.tga

...eScenes/IsetbioExamples/Car/Models/Mercedes SLS/skyxn.tga

...cenes/IsetbioExamples/Car/Models/Mercedes SLS/sls_amg.lwo

...cenes/IsetbioExamples/Car/Models/Mercedes SLS/sls_amg.max

...Scenes/IsetbioExamples/Car/Models/Mercedes SLS/sls_amg.mb

...cenes/IsetbioExamples/Car/Models/Mercedes SLS/sls_amg.mtl

...cenes/IsetbioExamples/Car/Models/Mercedes SLS/sls_amg.obj

.../IsetbioExamples/Car/Models/Mercedes SLS/sls_interior.tga

...cenes/IsetbioExamples/Car/Models/Mercedes SLS/tire(3).tga