Intel GPUs exhibit a number of rendering artifacts.
The most substantial being incorrect resolve of reflections.
Splitting the reflections_resolve shader into two passes,
one for SSR and one for light probes ensures correct rendering
and optimal performance on this GPU.
Also resolves an artifact with ambient occlusion wherein
the pow(a, b) function causes excessive precision loss.
Using an alternative method for power calculation on these
platforms resolves the issues.
Authored by Apple: Michael Parkin-White
Ref T96261
Pull Request #105240
06cf84f77f