Hi,
Are there any (not too far into the future) plans to support ScreenTraces as used in Lumen and MegaLights within a (distributed) tiled rendering topology such as ST 2110 with inner frustum quad-split? We have tested this out recently and (not surprisingly) could identify seam issues across the inner frustum quad split with ScreenTraces enabled in the Software RayTraced version on Lumen. The quad split was set up with 2x machines, each 2xGPUs, i.e. one UE instance per machine.
I am aware of why this is a challenge, as it would theoretically require something like transferring the HZB encoded across RGB for Rivermax after pre-pass via GPUDirect, wait in each local render loop on the other tiled HZB’s before the ScreenTrace pass and then sample the full-frame HZB afterwards during the ScreenTrace pass.
Other solutions I have in mind not involving network transfer are more on the rendering algorithm itself, i.e. not having the need for ScreenTraces by design.
Wanted to see if there are any plans for you to address this anytime soon, before I hack my way into it again.
Hope you are all well!
Best,
Markus