Normally we provide a list a files required by your mxs scene file. However, the new release of Maxwell 1.5 does not give us the necessary log output information that was included in previous release. We are working with the Next Limit team to resolve  this, and will correct this issue as soon as possible. We appreciate your patience in the mean time.

So, when submitting Maxwell 1.5 render jobs, be sure to upload all the required texture maps so that your images render as you would expect.