[Physics] Physics Digest, Vol 21, Issue 4

[Ilja Schmelzer]

To answer

"What alternative 3-D truth exists which mathematically appears/behave as 4D
continuum?"

There is the straightforward "alternative", namely the original
interpretation of SR, the Lorentz ether.

Today it is known, but unfortunately only to very few people, that it
can be easily extended to a Lorentz ether interpretation of the GR
equations too.  See http://ilja-schmelzer.de/ether for the details.
It gives a compressible ether which follows continuity and Euler
equations and is universal, all matter fields are also waves of
variables describing the state of the ether. So, the generalized
Lorentz ether is in many aspects much superior to the original one,
which was incompressible but with waves, and with matter going through
it without feeling resistance, which is quite natural for waves but
not for a different matter.

I do not understand why critics of relativity do not embrace this
simple and straightforward alternative.