diff --git a/agi.c b/agi.c
index b0a9fce..53bc38d 100644
--- a/agi.c
+++ b/agi.c
@@ -149,7 +149,7 @@ static void           updateEgoFromInput(void);
 static AgiGameT          gGame;
 static AgiPicT           gPic;
 static jlSurfaceT       *gBackdrop;
-static jlSurfaceT       *gStage;
+static jlSurfaceT       *gAgiStage;
 static AgiVmT            gVm;
 static LogicCacheSlotT   gLogicCache[AGI_MAX_RESOURCES];
 // View cache: 256 slots of ~5 KB each (~1.3 MB). Far too large for the
@@ -546,7 +546,7 @@ static void cbOverlayPic(void *ctx, uint8_t picId) {
 static void cbShowPic(void *ctx) {
     (void)ctx;
     jlLogF("cbShowPic v11=%u", (unsigned)gVm.vars[11]);
-    if (gStage == NULL) {
+    if (gAgiStage == NULL) {
         return;
     }
     // Clear the WHOLE stage first so the rows above/below the AGI
@@ -556,10 +556,10 @@ static void cbShowPic(void *ctx) {
     // copy below and gets restored over every subsequent frame --
     // so clear.lines never visually erases anything that sat in
     // the border bands.
-    jlSurfaceClear(gStage, COLOR_MISSING);
-    agiPicBlit(&gPic, gStage, PIC_DEST_Y);
+    jlSurfaceClear(gAgiStage, COLOR_MISSING);
+    agiPicBlit(&gPic, gAgiStage, PIC_DEST_Y);
     if (gBackdrop != NULL) {
-        jlSurfaceCopy(gBackdrop, gStage);
+        jlSurfaceCopy(gBackdrop, gAgiStage);
     }
     gPicReady = true;
     // The stage just got repainted; any prior save-under refers to
@@ -1716,8 +1716,8 @@ int main(int argc, char **argv) {
     jlLogReset();
     jlLogF("AGI TRACE build=%s %s", __DATE__, __TIME__);
     jlLogFlush();
-    gStage = jlStageGet();
-    jlPaletteSet(gStage, 0u, kAgiPalette);
+    gAgiStage = jlStageGet();
+    jlPaletteSet(gAgiStage, 0u, kAgiPalette);
     jlRandomSeed(0xA61DA61Du);
 
     // Bring up the SB DMA + mixer. AGI music feeds the SFX stream
@@ -1786,7 +1786,7 @@ int main(int argc, char **argv) {
         }
     }
 
-    jlSurfaceClear(gStage, COLOR_MISSING);
+    jlSurfaceClear(gAgiStage, COLOR_MISSING);
     if (gBackdrop != NULL) {
         jlSurfaceClear(gBackdrop, COLOR_MISSING);
     }
@@ -1852,7 +1852,7 @@ int main(int argc, char **argv) {
             {
                 uint32_t  nowMs2 = jlMillisElapsed();
                 if (nowMs2 - lastRenderMs >= AGI_RENDER_PERIOD_MS) {
-                    renderFrame(gStage);
+                    renderFrame(gAgiStage);
                     lastRenderMs = nowMs2;
                 } else {
                     jlStagePresent();