diff --git a/drivers/gles3/rasterizer_storage_gles3.cpp b/drivers/gles3/rasterizer_storage_gles3.cpp
index 247b30811e4..8311d0de842 100644
--- a/drivers/gles3/rasterizer_storage_gles3.cpp
+++ b/drivers/gles3/rasterizer_storage_gles3.cpp
@@ -8158,7 +8158,7 @@ void RasterizerStorageGLES3::initialize() {
 	}
 
 	shaders.cubemap_filter.init();
-	bool ggx_hq = GLOBAL_GET("rendering/quality/reflections/high_quality_ggx.mobile");
+	bool ggx_hq = GLOBAL_GET("rendering/quality/reflections/high_quality_ggx");
 	shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::LOW_QUALITY, !ggx_hq);
 	shaders.particles.init();
 
diff --git a/drivers/gles3/shaders/cubemap_filter.glsl b/drivers/gles3/shaders/cubemap_filter.glsl
index f65f798ff0a..619e29b1302 100644
--- a/drivers/gles3/shaders/cubemap_filter.glsl
+++ b/drivers/gles3/shaders/cubemap_filter.glsl
@@ -163,7 +163,7 @@ vec2 Hammersley(uint i, uint N) {
 
 #else
 
-#define SAMPLE_COUNT 512u
+#define SAMPLE_COUNT 1024u
 
 #endif
 
diff --git a/scene/resources/sky.cpp b/scene/resources/sky.cpp
index 48945d4e63c..292fdcdbd2a 100644
--- a/scene/resources/sky.cpp
+++ b/scene/resources/sky.cpp
@@ -62,7 +62,7 @@ void Sky::_bind_methods() {
 }
 
 Sky::Sky() {
-	radiance_size = RADIANCE_SIZE_512;
+	radiance_size = RADIANCE_SIZE_128;
 }
 
 /////////////////////////////////////////