I don't know if there is a top limit ro the size of the texture. But here's something from the docs:


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Case 2: Sometimes the memory estimation is wrong and your rendering job can't finish. If you see something like:

Error: Free memory is low. Memory exception thrown


you can try to force the tile sizes to be smaller so the rendering job fits into memory.

Question

How do you force the tile sizes?

Answer

From the command shell use the flags -tw and -th. The valid value range is between 16 and 256.

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More on this in the docs under the Rendering utilities section...