diff --git a/ui/frame.cpp b/ui/frame.cpp
index f444d03..a49abe8 100644
--- a/ui/frame.cpp
+++ b/ui/frame.cpp
@@ -915,8 +915,19 @@ __attribute__((optimize("O3"))) static uint8_t *bgra64torgb24(uint8_t *orig, siz
 			
 			__m128i z[8] = {};
 			for(int zi = 0; zi < 8; zi++) {
-				z[zi] = _mm_loadu_si128((__m128i*) temp + zi);
-				z[zi] = apply_gamma_epi16(z[zi], _mm_set_ps(1, 1 / 2.2f, 1 / 2.2f, 1 / 2.2f));
+				// Alpha-blend with checkered background.
+				__m128i bottom = (((x + zi) / 4 ^ y / 4) & 1)
+					? _mm_set_epi16(0xFFFF, 0x8000, 0x8000, 0x8000, 0xFFFF, 0x8000, 0x8000, 0x8000)
+					: _mm_set_epi16(0xFFFF, 0x4000, 0x4000, 0x4000, 0xFFFF, 0x4000, 0x4000, 0x4000);
+				
+				__m128i top = _mm_loadu_si128((__m128i*) temp + zi);
+				
+				__m128i alpha = _mm_shuffle_epi8(top, _mm_set_epi8(15, 14, 15, 14, 15, 14, 15, 14, 7, 6, 7, 6, 7, 6, 7, 6));
+				__m128i invAlpha = _mm_sub_epi16(_mm_set1_epi16(0xFFFF), alpha);
+				
+				__m128i result = _mm_add_epi16(_mm_mulhi_epu16(top, alpha), _mm_mulhi_epu16(bottom, invAlpha));
+				
+				z[zi] = apply_gamma_epi16(result, _mm_set_ps(1, 1 / 2.2f, 1 / 2.2f, 1 / 2.2f));
 			}
 			
 			__m128i a = _mm_shuffle_epi8(z[0], _mm_set_epi8(-128, -128, -128, -128, -128, -128, -128, -128, -128, -128, 9, 11, 13, 1, 3, 5));