It should be possible to create a higher level spell that masks a spell from true seeing by using the spell research rules. Also, a wish should be able to fool true seeing.
I don't think non-dection would work, as true seeing doesn't seem to be similar to a crystal ball.
The clothing is an intesting point. But considering the clipping errors you can cause with true seeing, it makes sense.
I don't think non-dection would work, as true seeing doesn't seem to be similar to a crystal ball.
The clothing is an intesting point. But considering the clipping errors you can cause with true seeing, it makes sense.