- add a flag to run the sample using regular, non-external texture as render target. - Add a non-external version of the material - vk: fix y-flipping issue with uvToRenderTargetUV()
- add a flag to run the sample using regular, non-external texture as render target. - Add a non-external version of the material - vk: fix y-flipping issue with uvToRenderTargetUV()