Get some more wins for overall downrezzing and minimizing thrashing.

Also make sure that probes don't stamp - that creates thrashing when distant probes render.  We're at a low enough resolution on those things that higher mips are likely to go unnoticed, and we bake them frequently enough that we can pick up lower mips when we actually need them.

1 files changed, 47 insertions, 3 deletions

diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 864b85034e..bdcbf3b7f2 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -11896,7 +11896,7 @@
     <key>TexturePixelToTexelRatio</key>
     <map>
       <key>Comment</key>
-      <string>Global maximum pixel:texel ratio, expressed as texels per screen pixel (the "R" in 1:R). 1.0 = one texel per pixel, the best quality the streamer will allocate. A texture is sized so its most-demanding on-screen face stays at or below this many texels per pixel; everything coarser falls out by distance. VRAM pressure walks the effective ratio down from here toward 0 (no floor).</string>
+      <string>Max texels per screen pixel the streamer will allocate (the "R" in a 1:R pixel:texel ratio). 1.0 = one texel per pixel. VRAM pressure walks the effective ratio down from here.</string>
       <key>Persist</key>
       <integer>1</integer>
       <key>Type</key>
@@ -11904,6 +11904,17 @@
       <key>Value</key>
       <real>1.0</real>
     </map>
+    <key>TextureBackgroundMinRatio</key>
+    <map>
+      <key>Comment</key>
+      <string>Lowest pixel:texel ratio the streamer decays to while the viewer is backgrounded, to free VRAM for other apps. Lower frees more but re-rezzes slower on return. Restored when focus comes back.</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>F32</string>
+      <key>Value</key>
+      <real>0.001</real>
+    </map>
     <key>TexturePressureHighWater</key>
     <map>
       <key>Comment</key>
@@ -11962,13 +11973,46 @@
     <key>TextureCooldownStepSeconds</key>
     <map>
       <key>Comment</key>
-      <string>Seconds an unseen texture waits per mip level before stepping down. When a texture stops being bound (occluded / off-screen) or the window is backgrounded, its discard rises one level every this many seconds until it reaches the deepest mip, instead of snapping there immediately - so briefly-unseen content isn't thrown away and refetched (cache thrash) if it reappears. Resets the moment the texture is bound again.</string>
+      <string>While backgrounded, the pixel:texel ratio drops one mip toward TextureBackgroundMinRatio every this many seconds.</string>
       <key>Persist</key>
       <integer>1</integer>
       <key>Type</key>
       <string>F32</string>
       <key>Value</key>
-      <real>1.0</real>
+      <real>5.0</real>
+    </map>
+    <key>TextureGCStepFrames</key>
+    <map>
+      <key>Comment</key>
+      <string>Foreground GC cooldown, in rendered frames. For every this many frames a texture goes without being drawn, its mip drops by TextureGCStepMips. Resets when the texture is drawn again.</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>U32</string>
+      <key>Value</key>
+      <integer>5</integer>
+    </map>
+    <key>TextureGCStepMips</key>
+    <map>
+      <key>Comment</key>
+      <string>Mip levels dropped each time a TextureGCStepFrames cooldown elapses. 1 is gentlest; higher sheds VRAM faster in coarser jumps.</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>U32</string>
+      <key>Value</key>
+      <integer>1</integer>
+    </map>
+    <key>TextureFetchVisibilityFrames</key>
+    <map>
+      <key>Comment</key>
+      <string>Only fetch a texture if it was drawn within this many rendered frames; out-of-view content isn't fetched. Minimum 1 (0 is clamped up). Boosted/UI textures, avatar bakes, and callback textures are exempt.</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>U32</string>
+      <key>Value</key>
+      <integer>1</integer>
     </map>
     <key>TextureDecodeDisabled</key>
     <map>