I've been practicing baking the procedural shader and making seamless (or nearly seamless) tiles. Using these images saves a lot of time in the render and gives better results with more relaxed render settings.

Try this. You may include this image (or derivatives) in freebies and products if you like.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)