>>2390209>>2390419I'd recommed using the 64bit version of MMD since the limitations on it are less than the regular 32bit version, I've always used textures that are 2048*2048 without a problem, loaded stages that are around 40MB no issues and up to 10 models with shaders, it will slow everything down though, now if you have to troubleshoot a model I'd suggest using the validation tool on PMXe, it's on the file menu, you may have to use google translate if your PMXe is in Japanese, also check this PDF on how to solve common issues detected by the valitation tool, some of them can crash MMD, I found it on DA of all places.
http://www.mediafire.com/file/fd31q89i3l0qu2y/PMX_validation.pdf/file 