implementing battletoads background pass in URP

i am trying to implement this example:

the basic idea is:

1. render the background with a separate camera into a rendertexture (lower resolution, differnt settings etc)
2. render the rendertexture to the main camera before rendering the foreground

now, for step 2, in the video they use:

Code (CSharp):

1.  
2. commandBuffer = new CommandBuffer();
3.         commandBuffer.Blit(rtToBlit, BuiltinRenderTextureType.CurrentActive);
4.         commandBuffer.name = "blit Half Res";
5.  
6.         targetCamera.AddCommandBuffer(CameraEvent.BeforeForwardOpaque, commandBuffer);
7.  

to copy the rendertexture onto the main camera before rendring the objects.
however, this command buffer is no longer executed in URP

i though of (unsuccessfull) solutions:

A) do everything the same, but do the copy to the main camera in a renderfeature.
but this has the problem, that RendererFeatures are executed on all cameras, including the background camera, creating a feedbackloop.

B) use the RenderObjects render Feature to render the background first, then the foreground.
this has the issue, that we cannot define a rendertexture to the background pass, so we cannot adjust the resolution / effects.

C) use camera stacking
same issue as B: we cannot define a rendertexture or resolution for stacked cameras. they all render to the same buffer.

 

Did you solve this?