His body was becoming insubstantial.

There was no struggle, like trying to walk through water; but she had a sense of floating, as if her body had become insubstantial, like an air bubble.

Trees had become insubstantial; we could walk right through them.

I tried to picture again the galleries, the libraries, the long, long rows of books, and realized suddenly it had become insubstantial; the details were disappearing.

The interface got thinner as I moved forward, becoming insubstantial as smoke.

Time shattered into 10,000 fragments and, like moonlight on water, became insubstantial.

One of its wings entered the Boundary and all but disappeared, becoming insubstantial.

He was becoming insubstantial.

On the last occasions on which she had she had become insubstantial, whereas Celia had become the more real.

Even those few boards that remained beneath his feet were becoming insubstantial.