diff --git a/src/r_poly_cull.cpp b/src/r_poly_cull.cpp
index dff8b7688..79b8d151d 100644
--- a/src/r_poly_cull.cpp
+++ b/src/r_poly_cull.cpp
@@ -181,10 +181,10 @@ bool PolyCull::CheckBBox(float *bspcoord)
 	for (int i = 0; i < 4; i++)
 	{
 		int j = i < 3 ? i + 1 : 0;
-		int x1 = bspcoord[lines[i][0]];
-		int y1 = bspcoord[lines[i][1]];
-		int x2 = bspcoord[lines[i][2]];
-		int y2 = bspcoord[lines[i][3]];
+		float x1 = bspcoord[lines[i][0]];
+		float y1 = bspcoord[lines[i][1]];
+		float x2 = bspcoord[lines[i][2]];
+		float y2 = bspcoord[lines[i][3]];
 		int sx1, sx2;
 		if (GetSegmentRangeForLine(x1, y1, x2, y2, sx1, sx2))
 		{
diff --git a/src/r_poly_sprite.cpp b/src/r_poly_sprite.cpp
index 38ddd46df..87d52b98f 100644
--- a/src/r_poly_sprite.cpp
+++ b/src/r_poly_sprite.cpp
@@ -190,7 +190,7 @@ void RenderPolySprite::Render(const TriMatrix &worldToClip, AActor *thing, subse
 	else if (thing->RenderStyle == LegacyRenderStyles[STYLE_AddStencil])
 	{
 		args.uniforms.destalpha = 256;
-		args.uniforms.srcalpha = (uint32_t)(thing->Alpha * 256) * 2; // Don't know this needs to be multiplied by two..
+		args.uniforms.srcalpha = (uint32_t)(thing->Alpha * 256);
 		args.uniforms.color = 0xff000000 | thing->fillcolor;
 		blendmode = TriBlendMode::Stencil;
 	}
diff --git a/src/r_poly_triangle.cpp b/src/r_poly_triangle.cpp
index 2ba3336d1..88ee02a36 100644
--- a/src/r_poly_triangle.cpp
+++ b/src/r_poly_triangle.cpp
@@ -339,7 +339,40 @@ void DrawPolyTrianglesCommand::Execute(DrawerThread *thread)
 
 FString DrawPolyTrianglesCommand::DebugInfo()
 {
-	return "DrawPolyTriangles";
+	FString variantstr;
+	switch (variant)
+	{
+	default: variantstr = "Unknown"; break;
+	case TriDrawVariant::DrawNormal: variantstr = "DrawNormal"; break;
+	case TriDrawVariant::FillNormal: variantstr = "FillNormal"; break;
+	case TriDrawVariant::DrawSubsector: variantstr = "DrawSubsector"; break;
+	case TriDrawVariant::FillSubsector: variantstr = "FillSubsector"; break;
+	case TriDrawVariant::FuzzSubsector: variantstr = "FuzzSubsector"; break;
+	case TriDrawVariant::Stencil: variantstr = "Stencil"; break;
+	}
+
+	FString blendmodestr;
+	switch (blendmode)
+	{
+	default: blendmodestr = "Unknown"; break;
+	case TriBlendMode::Copy: blendmodestr = "Copy"; break;
+	case TriBlendMode::AlphaBlend: blendmodestr = "AlphaBlend"; break;
+	case TriBlendMode::AddSolid: blendmodestr = "AddSolid"; break;
+	case TriBlendMode::Add: blendmodestr = "Add"; break;
+	case TriBlendMode::Sub: blendmodestr = "Sub"; break;
+	case TriBlendMode::RevSub: blendmodestr = "RevSub"; break;
+	case TriBlendMode::Stencil: blendmodestr = "Stencil"; break;
+	case TriBlendMode::Shaded: blendmodestr = "Shaded"; break;
+	case TriBlendMode::TranslateCopy: blendmodestr = "TranslateCopy"; break;
+	case TriBlendMode::TranslateAlphaBlend: blendmodestr = "TranslateAlphaBlend"; break;
+	case TriBlendMode::TranslateAdd: blendmodestr = "TranslateAdd"; break;
+	case TriBlendMode::TranslateSub: blendmodestr = "TranslateSub"; break;
+	case TriBlendMode::TranslateRevSub: blendmodestr = "TranslateRevSub"; break;
+	}
+
+	FString info;
+	info.Format("DrawPolyTriangles: variant = %s, blend mode = %s, color = %d", variantstr.GetChars(), blendmodestr.GetChars(), args.uniforms.color);
+	return info;
 }
 
 /////////////////////////////////////////////////////////////////////////////