I have toyed with this idea but am concerned that over time, crud might accumulate between a fixed glass panel and the logs, cobwebs, dust, etc with no way to clean it. I've even looked into having a hinged glass panel there so that it could be swung aside to vacuum the logs but can find no practical way to do this.
I figure I can add a good size shower where that tub is currently and then a small tub in the diagonal corner but the tub will need to be small.
Something along these lines:
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