Raytracing was merged into Dev-Rendering!

This post from Epic staff tells that it needs an RTX card:
https://forums.unrealengine.com/deve…74#post1567574

For this to work with any non-RTX card, the card vendor needs to add driver support feature to comply with DXR. The implementation Epic does comply with DXR, not specifically with NVidia RTX cards, so if vendors does not add support you won’t see this working.