https://communities.sas.com/t5/Graphics-Programming/Earliest-references-on-Screen-Space-Reflections-Pre-2000s/m-p/919266#M24423 <P>In one of my first (non-realtime) 3d graphics software projects in the mid 90s, we used a non-raytraced screen-space reflections method, because we used procedural geometry that exceeded the memory resources of the computers we ran on. We rendered a scene, capturing RGBA+depth, and deferred rendering the reflective surfaces until all other rendering was complete. Then we'd come back and ray trace the reflective fragments against the world-space-projected depth buffer, and plot the reflected color as captured in the corresponding RGBA buffer. It was a good trick, because our reflective surfaces were almost always disturbed planes near the bottom of the image, and the other geometry was convex on the Z axis (no real overhangs that would have undersides that weren't visible in the screen-space rendering).</P><P>Someone asked me the other day about the technique and I realized we kinda just made it up at the time, we didn't really have a reference (unlike most of the other techniques we used, where we just implemented someone else's paper like Worley's cellular basis function or fBm or whatever).</P><P>There was a lot of interest in SSR in the 2000s in real-time rendering, but I can't unearth any earlier stuff. Was it a technique back in the 90s?</P> Thu, 07 Mar 2024 09:54:16 GMT nejoo 2024-03-07T09:54:16Z https://communities.sas.com/t5/Graphics-Programming/Earliest-references-on-Screen-Space-Reflections-Pre-2000s/m-p/919266#M24423 <P>In one of my first (non-realtime) 3d graphics software projects in the mid 90s, we used a non-raytraced screen-space reflections method, because we used procedural geometry that exceeded the memory resources of the computers we ran on. We rendered a scene, capturing RGBA+depth, and deferred rendering the reflective surfaces until all other rendering was complete. Then we'd come back and ray trace the reflective fragments against the world-space-projected depth buffer, and plot the reflected color as captured in the corresponding RGBA buffer. It was a good trick, because our reflective surfaces were almost always disturbed planes near the bottom of the image, and the other geometry was convex on the Z axis (no real overhangs that would have undersides that weren't visible in the screen-space rendering).</P><P>Someone asked me the other day about the technique and I realized we kinda just made it up at the time, we didn't really have a reference (unlike most of the other techniques we used, where we just implemented someone else's paper like Worley's cellular basis function or fBm or whatever).</P><P>There was a lot of interest in SSR in the 2000s in real-time rendering, but I can't unearth any earlier stuff. Was it a technique back in the 90s?</P> Thu, 07 Mar 2024 09:54:16 GMT https://communities.sas.com/t5/Graphics-Programming/Earliest-references-on-Screen-Space-Reflections-Pre-2000s/m-p/919266#M24423 nejoo 2024-03-07T09:54:16Z https://communities.sas.com/t5/Graphics-Programming/Earliest-references-on-Screen-Space-Reflections-Pre-2000s/m-p/919272#M24424 <P>This doesn't appear to be a question about SAS. Is it?</P> Thu, 07 Mar 2024 10:51:44 GMT https://communities.sas.com/t5/Graphics-Programming/Earliest-references-on-Screen-Space-Reflections-Pre-2000s/m-p/919272#M24424 PaigeMiller 2024-03-07T10:51:44Z