If we are talking about file size limitations of Crazytalk 6 then there aren't any software wise.
Any limitations will come from the file system and operating system of your computer. If you are using a computer with a FAT32 file system then the file size limit is 4GB. If you are using a computer with a NTFS file system (most likely) then there is no restictive limit. For example my last rendered file size from Crazytalk 6 was 15GB but this was 1080HD.
Who told you there was a file size limit of 4MB? A video file this small would have to be very low resolution and very short, probably under a minute in length.
Peter
Forum Administrator
www.reallusion.com