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And if someone from Game development communities could explain how hard is it to do RTX or DirectX RT on current games? Would companies now have to do two set of graphics, design, and code path? One that does it with DirectX RT the other doing it with all the Rasterisation technique such as Shadow mapping etc.

Basically I am interested in the Cost of such Direct X RT implementation. And what sort of time frame could we see these on the market.

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It's a big step, both assets and codepath have to change to make full use of it. It's possible to change some effects to work in a forwards-compatible way, but this isn't a free lunch. As an traditional GPU, the RTX is only slightly better than the existing 10-series.

Since AMD continues to hold console developers with their semi-custom chips, this is only likely to impact a limited set of titles in the near future.

Naturally multiple code paths are required, as always.

Yes but it means another set of path to test and optimise. Another set of Graphics design asset for RT. As if the current AAA titles budget are not expensive enough. Instead of making quality games cheaper, we are making graphics intensive games even more expensive to build. And I don't think it is healthy at all.

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