diff --git a/src/r_poly_sprite.cpp b/src/r_poly_sprite.cpp
index 2cb285298..182135753 100644
--- a/src/r_poly_sprite.cpp
+++ b/src/r_poly_sprite.cpp
@@ -185,7 +185,7 @@ void RenderPolySprite::Render(const TriMatrix &worldToClip, const Vec4f &clipPla
 	{
 		args.uniforms.destalpha = (uint32_t)(1.0 * 256);
 		args.uniforms.srcalpha = (uint32_t)(thing->Alpha * 256);
-		blendmode = args.translation ? TriBlendMode::TranslateSub : TriBlendMode::Sub;
+		blendmode = args.translation ? TriBlendMode::TranslateRevSub : TriBlendMode::RevSub;
 	}
 	else if (thing->RenderStyle == LegacyRenderStyles[STYLE_SoulTrans])
 	{
diff --git a/tools/drawergen/fixedfunction/drawercodegen.cpp b/tools/drawergen/fixedfunction/drawercodegen.cpp
index ccff40ac0..f7a67e5a6 100644
--- a/tools/drawergen/fixedfunction/drawercodegen.cpp
+++ b/tools/drawergen/fixedfunction/drawercodegen.cpp
@@ -119,7 +119,7 @@ SSAVec4i DrawerCodegen::blend_sub(SSAVec4i fg, SSAVec4i bg, SSAInt srcalpha, SSA
 	SSAInt alpha = fg[3];
 	alpha = alpha + (alpha >> 7); // 255 -> 256
 	srcalpha = (alpha * srcalpha + 128) >> 8;
-	SSAVec4i color = (bg * destalpha - fg * srcalpha) / 256;
+	SSAVec4i color = (fg * srcalpha - bg * destalpha) / 256;
 	return color.insert(3, 255);
 }
 
@@ -128,7 +128,7 @@ SSAVec4i DrawerCodegen::blend_revsub(SSAVec4i fg, SSAVec4i bg, SSAInt srcalpha,
 	SSAInt alpha = fg[3];
 	alpha = alpha + (alpha >> 7); // 255 -> 256
 	srcalpha = (alpha * srcalpha + 128) >> 8;
-	SSAVec4i color = (fg * srcalpha - bg * destalpha) / 256;
+	SSAVec4i color = (bg * destalpha - fg * srcalpha) / 256;
 	return color.insert(3, 255);
 }