diff --git a/include/tz/gpu/resource.hpp b/include/tz/gpu/resource.hpp
index 0cf378fdd6..1d8807dbca 100644
--- a/include/tz/gpu/resource.hpp
+++ b/include/tz/gpu/resource.hpp
@@ -208,6 +208,8 @@ namespace tz::gpu
 	 */
 	tz::error_code resource_write(resource_handle res, std::span<const std::byte> new_data, std::size_t offset = 0);
 	std::size_t resource_size(resource_handle res);
+	unsigned int image_get_width(resource_handle res);
+	unsigned int image_get_height(resource_handle res);
 	/**
 	 * @ingroup tz_gpu_resource
 	 * @brief Retrieves the current data within a resource.
diff --git a/include/tz/ren/quad.hpp b/include/tz/ren/quad.hpp
index 75a4a4a8ad..a340aaed54 100644
--- a/include/tz/ren/quad.hpp
+++ b/include/tz/ren/quad.hpp
@@ -33,6 +33,7 @@ namespace tz::ren
 	{
 		tz::v4f clear_colour = {0.0f, 0.0f, 0.0f, 1.0f};
 		quad_renderer_flag flags = static_cast<quad_renderer_flag>(0);
+		tz::gpu::resource_handle colour_target = tz::gpu::window_resource;
 	};
 	
 	std::expected<quad_renderer_handle, tz::error_code> create_quad_renderer(quad_renderer_info info);
diff --git a/src/tz/gpu/rhi_vulkan.cpp b/src/tz/gpu/rhi_vulkan.cpp
index 430a27eb47..e59376cda5 100644
--- a/src/tz/gpu/rhi_vulkan.cpp
+++ b/src/tz/gpu/rhi_vulkan.cpp
@@ -941,6 +941,42 @@ namespace tz::gpu
 		return resources[resh.peek()].data.size();
 	}
 
+	unsigned int image_get_width(resource_handle res)
+	{
+		if(res == tz::nullhand)
+		{
+			return 0u;
+		}
+		if(res == tz::gpu::window_resource)
+		{
+			return swapchain_width;
+		}
+		const auto& resource = resources[res.peek()];
+		if(!resource.is_image())
+		{
+			return 0u;
+		}
+		return std::get<image_info>(resource.res).width;
+	}
+
+	unsigned int image_get_height(resource_handle res)
+	{
+		if(res == tz::nullhand)
+		{
+			return 0u;
+		}
+		if(res == tz::gpu::window_resource)
+		{
+			return swapchain_height;
+		}
+		const auto& resource = resources[res.peek()];
+		if(!resource.is_image())
+		{
+			return 0u;
+		}
+		return std::get<image_info>(resource.res).height;
+	}
+
 	std::span<const std::byte> resource_read(resource_handle resh)
 	{
 		auto& res = resources[resh.peek()];
diff --git a/src/tz/ren/quad.cpp b/src/tz/ren/quad.cpp
index fbf95a56c2..39c8479fec 100644
--- a/src/tz/ren/quad.cpp
+++ b/src/tz/ren/quad.cpp
@@ -85,7 +85,7 @@ namespace tz::ren
 
 		tz::gpu::resource_handle colour_targets[] = 
 		{
-			tz::gpu::window_resource
+			info.colour_target
 		};
 		tz::gpu::resource_handle resources[] =
 		{
@@ -253,8 +253,8 @@ namespace tz::ren
 	{
 		auto& ren = renderers[renh.peek()];
 
-		auto w = tz::os::window_get_width();
-		auto h = tz::os::window_get_height();
+		auto w = tz::gpu::image_get_width(ren.info.colour_target);
+		auto h = tz::gpu::image_get_height(ren.info.colour_target);
 		if((w != 0 && h != 0) && (ren.window_width_cache != w || ren.window_height_cache != h))
 		{
 			// window has resized