Ray traced global illumination in the upgrade has much in common with GTA 6 tech.
To begin with though, let’s be realistic.
Even so, the upgrades are welcome.
Indirect lighting in the original is handled in an interesting way, however.
Let me ground my reasoning here with a number of points.
For example, in Dying Light 2, the RTGI only works from the sun but not other lights.
That’s not the case here - it’s far more comprehensive.
Firstly, it applies to all and any light sources, not just the sun.
This is not just limited to stationary lights, but even moving lights like those from cars.
And that fidelity is such that it seems unlikely to have been a simple, bolt-on feature.
Not only that, but it’s performant and optimised too.
That makes sense for quality reasons, but it’s very expensive for RTGI.
In this scenario, Rockstar ensures that these textures never test transparency.
In this scenario, optimised options aren’t really required.
For a game like GTA 6, I cannot imagine that would be the case.
