Output image subdivided in zoomed tiles

[PowZone]

I have a strange issue using realesrgan-ncnn-vulkan.exe: output images seems subdivided in zoomed tiles.

cmd> realesrgan-ncnn-vulkan.exe -s 2 -n realesrgan-x4plus -v -i src.png -o out.png

I tried different -t values but the problem is always the same.

[sirus20x6]

same issue here. AMD card

[Nenotriple]

Use -s 4 (or remove the argument) and then resize the image manually after upscaling.