diff --git a/GPU/Common/GPUStateUtils.cpp b/GPU/Common/GPUStateUtils.cpp
index 534f117bad..a9f99f793f 100644
--- a/GPU/Common/GPUStateUtils.cpp
+++ b/GPU/Common/GPUStateUtils.cpp
@@ -581,7 +581,9 @@ void ConvertViewportAndScissor(bool useBufferedRendering, float renderWidth, flo
 		renderHeightFactor = renderHeight / 272.0f;
 	}
 
-	// negative offsets we take care of in the projection matrix.
+	// We take care negative offsets of in the projection matrix.
+	// These come from split framebuffers (Killzone).
+	// TODO: Might be safe to do get rid of this here and do the same for positive offsets?
 	renderX = std::max(gstate_c.curRTOffsetX, 0);
 	renderY = std::max(gstate_c.curRTOffsetY, 0);
 
diff --git a/GPU/Common/ShaderUniforms.cpp b/GPU/Common/ShaderUniforms.cpp
index 3e5424713d..c3480e6fef 100644
--- a/GPU/Common/ShaderUniforms.cpp
+++ b/GPU/Common/ShaderUniforms.cpp
@@ -152,10 +152,11 @@ void BaseUpdateUniforms(UB_VS_FS_Base *ub, uint64_t dirtyUniforms, bool flipView
 		if (!useBufferedRendering && g_display_rotation != DisplayRotation::ROTATE_0) {
 			proj_through = proj_through * g_display_rot_matrix;
 		}
+
+		// Negative RT offsets come from split framebuffers (Killzone)
 		if (gstate_c.curRTOffsetX < 0 || gstate_c.curRTOffsetY < 0) {
-			Matrix4x4 xlate;
-			xlate.setTranslation(Lin::Vec3(2.0f * gstate_c.curRTOffsetX / (int)gstate_c.curRTWidth, 2.0f * gstate_c.curRTOffsetY / (int)gstate_c.curRTHeight, 0.0f));
-			proj_through = proj_through * xlate;
+			proj_through.wx += 2.0f * (float)gstate_c.curRTOffsetX / (float)gstate_c.curRTWidth;
+			proj_through.wy += 2.0f * (float)gstate_c.curRTOffsetY / (float)gstate_c.curRTHeight;
 		}
 
 		CopyMatrix4x4(ub->proj_through, proj_through.getReadPtr());