This will be fixed (now) in the Service Release 2 patch that should be available in some form this coming week. It wasn't an issue of telling the content creators. It was a bug in the code that we weren't aware of until revealed in this thread. It was never intended to be a limitation of the textures. One comment on the 3000x3000 texture size. This is a pretty large texture, and if you don't need this for a large render, you should make textures smaller than this. A 3000x3000 texture (without texture filtering) will require more than 100 megabytes of memory to hold it. And there may need to be two copies temporarily. With summed area texture filtering, this may double again. So if you have many textures, and all are 3000x3000, you will be getting very large renders. This was why we added the maximum texture size tweak in the render options. This way you can lower them all down in one shot while doing draft renders.