diff --git a/port/fast3d/gfx_pc.cpp b/port/fast3d/gfx_pc.cpp
index e5722d8c8..fe989e085 100644
--- a/port/fast3d/gfx_pc.cpp
+++ b/port/fast3d/gfx_pc.cpp
@@ -1540,7 +1540,7 @@ static void gfx_sp_tri1(uint8_t vtx1_idx, uint8_t vtx2_idx, uint8_t vtx3_idx, bo
                             // HACK: very roughly eyeballed based on the carpets in Defection
                             // this is actually supposed to be calculated per pixel
                             const float distance_frac = std::max(0.f, std::min(w / 1024.f, 1.f));
-                            tmp.r = tmp.g = tmp.b = tmp.a = (0.65f + distance_frac * 0.35f) * 255.f;
+                            tmp.r = tmp.g = tmp.b = tmp.a = (0.7f + distance_frac * 0.3f) * 255.f;
                         } else {
                             tmp.r = tmp.g = tmp.b = tmp.a = 255;
                         }
diff --git a/port/src/system.c b/port/src/system.c
index e889f75df..36f9475ce 100644
--- a/port/src/system.c
+++ b/port/src/system.c
@@ -22,6 +22,10 @@ static CREATEWAITABLETIMEREXAFN pfnCreateWaitableTimerExA;
 // winapi also provides a yield macro
 #define DO_YIELD() YieldProcessor()
 
+// ask system for high performance GPU, if any
+__attribute__((dllexport)) u32 NvOptimusEnablement = 1;
+__attribute__((dllexport)) u32 AmdPowerXpressRequestHighPerformance = 1;
+
 #else
 
 #ifndef _GNU_SOURCE