diff --git a/src/osd/modules/render/bgfx/chainmanager.cpp b/src/osd/modules/render/bgfx/chainmanager.cpp
index f8053e83e77..633d384ddf9 100644
--- a/src/osd/modules/render/bgfx/chainmanager.cpp
+++ b/src/osd/modules/render/bgfx/chainmanager.cpp
@@ -44,7 +44,11 @@ bgfx_chain* chain_manager::chain(std::string name, running_machine& machine, uin
 
 bgfx_chain* chain_manager::load_chain(std::string name, running_machine& machine, uint32_t window_index)
 {
-	std::string path = std::string(m_options.bgfx_path()) + "/chains/" + name + ".json";
+	if (name.length() < 5 || (name.compare(name.length() - 5, 5, ".json")!= 0))
+	{
+		name = name + ".json";
+	}
+	std::string path = std::string(m_options.bgfx_path()) + "/chains/" + name;
 
 	bx::CrtFileReader reader;
 	bx::open(&reader, path.c_str());
diff --git a/src/osd/modules/render/drawbgfx.cpp b/src/osd/modules/render/drawbgfx.cpp
index 951d2c56e63..a6bb3b436e2 100644
--- a/src/osd/modules/render/drawbgfx.cpp
+++ b/src/osd/modules/render/drawbgfx.cpp
@@ -271,13 +271,6 @@ void renderer_bgfx::put_packed_quad(render_primitive *prim, UINT32 hash, ScreenV
 	float u[4] = { u0, u1, u0, u1 };
 	float v[4] = { v0, v0, v1, v1 };
 
-	bgfx::RendererType::Enum renderer_type = bgfx::getRendererType();
-	if (renderer_type == bgfx::RendererType::OpenGL || renderer_type == bgfx::RendererType::OpenGLES)
-	{
-		v[0] = v[1] = v1;
-		v[2] = v[3] = v0;
-	}
-
 	if (PRIMFLAG_GET_TEXORIENT(prim->flags) & ORIENTATION_SWAP_XY)
 	{
 		std::swap(u[1], u[2]);