diff --git a/CHANGES b/CHANGES
index a8121ee70..99e2f192a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -91,8 +91,9 @@ Emulation fixes:
  - ARM: Partially fix LDM/STM writeback with empty register list
  - ARM: Fix stepping when events are pending
  - GBA DMA: Fix case where DMAs could get misaligned (fixes mgba.io/i/1092)
- - GBA Video: Fix OpenGL renderer 512x512 backgrounds (fixes mgba.io/i/1572)
  - GBA Memory: Fix open bus from IWRAM (fixes mgba.io/i/1575)
+ - GBA Video: Fix OpenGL renderer 512x512 backgrounds (fixes mgba.io/i/1572)
+ - GBA Video: Fix BLDY for semitransparent sprite on non-target-2 backgrounds
 Other fixes:
  - 3DS: Fix screen darkening (fixes mgba.io/i/1562)
  - Core: Fix uninitialized memory issues with graphics caches
diff --git a/cinema/gba/blend/obj-semitrans-brighten/baseline_0000.png b/cinema/gba/blend/obj-semitrans-brighten/baseline_0000.png
new file mode 100644
index 000000000..65cca4f0a
Binary files /dev/null and b/cinema/gba/blend/obj-semitrans-brighten/baseline_0000.png differ
diff --git a/cinema/gba/blend/obj-semitrans-brighten/baseline_0001.png b/cinema/gba/blend/obj-semitrans-brighten/baseline_0001.png
new file mode 100644
index 000000000..65cca4f0a
Binary files /dev/null and b/cinema/gba/blend/obj-semitrans-brighten/baseline_0001.png differ
diff --git a/cinema/gba/blend/obj-semitrans-brighten/test.mvl b/cinema/gba/blend/obj-semitrans-brighten/test.mvl
new file mode 100644
index 000000000..966724a7d
Binary files /dev/null and b/cinema/gba/blend/obj-semitrans-brighten/test.mvl differ
diff --git a/include/mgba/internal/gba/renderers/video-software.h b/include/mgba/internal/gba/renderers/video-software.h
index b15dc47b4..59c2a7ce8 100644
--- a/include/mgba/internal/gba/renderers/video-software.h
+++ b/include/mgba/internal/gba/renderers/video-software.h
@@ -131,7 +131,8 @@ struct GBAVideoSoftwareRenderer {
 
 	struct GBAVideoSoftwareBackground bg[4];
 
-	int oamDirty;
+	bool forceTarget1;
+	bool oamDirty;
 	int oamMax;
 	struct GBAVideoRendererSprite sprites[128];
 	int16_t objOffsetX;
diff --git a/src/gba/renderers/software-obj.c b/src/gba/renderers/software-obj.c
index d638dd332..cbc050fc8 100644
--- a/src/gba/renderers/software-obj.c
+++ b/src/gba/renderers/software-obj.c
@@ -165,7 +165,7 @@ int GBAVideoSoftwareRendererPreprocessSprite(struct GBAVideoSoftwareRenderer* re
 	}
 
 	int objwinSlowPath = GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlGetBlendEnable(renderer->objwin.packed) != GBAWindowControlIsBlendEnable(renderer->currentWindow.packed);
-	int variant = renderer->target1Obj &&
+	int variant = (renderer->target1Obj || GBAObjAttributesAGetMode(sprite->a) == OBJ_MODE_SEMITRANSPARENT) &&
 	              GBAWindowControlIsBlendEnable(renderer->currentWindow.packed) &&
 	              (renderer->blendEffect == BLEND_BRIGHTEN || renderer->blendEffect == BLEND_DARKEN);
 	if (GBAObjAttributesAGetMode(sprite->a) == OBJ_MODE_SEMITRANSPARENT || objwinSlowPath) {
@@ -175,6 +175,7 @@ int GBAVideoSoftwareRendererPreprocessSprite(struct GBAVideoSoftwareRenderer* re
 		target2 |= renderer->bg[2].target2;
 		target2 |= renderer->bg[3].target2;
 		if (target2) {
+			renderer->forceTarget1 = true;
 			flags |= FLAG_REBLEND;
 			variant = 0;
 		} else {
diff --git a/src/gba/renderers/video-software.c b/src/gba/renderers/video-software.c
index bd47ad2b2..6be917d93 100644
--- a/src/gba/renderers/video-software.c
+++ b/src/gba/renderers/video-software.c
@@ -592,6 +592,7 @@ static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* render
 		_updatePalettes(softwareRenderer);
 		softwareRenderer->blendDirty = false;
 	}
+	softwareRenderer->forceTarget1 = false;
 
 	int w;
 	x = 0;
@@ -622,7 +623,7 @@ static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* render
 
 	_drawScanline(softwareRenderer, y);
 
-	if (softwareRenderer->target2Bd) {
+	if (softwareRenderer->forceTarget1 && softwareRenderer->target2Bd) {
 		x = 0;
 		for (w = 0; w < softwareRenderer->nWindows; ++w) {
 			uint32_t backdrop = 0;
@@ -640,9 +641,9 @@ static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* render
 			}
 		}
 	}
-	if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
+	if (softwareRenderer->forceTarget1 && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
 		x = 0;
-		uint32_t mask = FLAG_REBLEND | FLAG_TARGET_1 | FLAG_IS_BACKGROUND;
+		uint32_t mask = FLAG_REBLEND | FLAG_IS_BACKGROUND;
 		uint32_t match = FLAG_REBLEND;
 		if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
 			mask |= FLAG_OBJWIN;