Rendered texture has lower resolution than original image file
I try to render cubic panorama. I have the scene with cube around main camera. Cube is constructed with 6 cubic faces. I read texture from the file that is not in application assets or resources folders, but in the file system of my PC. I put appropriate fragments of loaded texture on the cube faces with appropriate mainTextureScales and mainTextureOffsets.
Everything seems fine. But rendered panorama has terrible large pixels. It seems that the texture I have loaded was resized to much smaller size.
Sure, I have very large file that consists of 6 images 2048x2048. So, the whole image has 12288x2048 size. But the Texture2D I have loaded this file into has correct, not reduced size: 12288x2048.
When I load textures for cube faces not from single file but from 6 separate files (each file contains 2048x2048 texture for appropriate face) the resolution is much better.
Could you please help me find the way to keep all faces textures in single file and put this texture with original, not reduced resolution.
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