  We use numerical simulations to calculate the cosmic microwave background
anisotropy induced by the evolution of a global texture field, with special
emphasis on individual textures. Both spherically symmetric and general
configurations are analysed, and in the latter case we consider field
configurations which exhibit unwinding events and also ones which do not. We
compare the results given by evolving the field numerically under both the
expanded core (XCORE) and non-linear sigma model (NLSM) approximations with the
analytic predictions of the NLSM exact solution for a spherically symmetric
self-similar (SSSS) unwinding. We find that the random unwinding configuration
spots' typical peak height is 60--75\% and angular size typically only 10\% of
those of the SSSS unwinding, and that random configurations without an
unwinding event nonetheless may generate indistinguishable hot and cold spots.
The influence of these results on analytic estimates of texture induced
microwave anisotropies is examined, and comparison made with other numerical
work.
