Pixel texture banding/stretching

Question

I am trying to create some Minecraft renders, and am trying to use Joey C's BlockBlender addon based on geometry nodes. Everything appears to be working, however on the viewport, the textures appear to be banding/stretching. The UVs appear to be in place and the addon itself has been tested before and no one else seems to be encountering this issue, but using the lighter free version of the same addon does not have the same issues and the blocks appear normally. The full version's texture file size is 14304x16 while the free version is 512x16. I use a 1050ti and 16 gigs of ram.

texture above (very small) ^^

Edit: The addon seems to be irrelevant in this case. I have a .BLEND file containing the geometry node as well, and even without the addon, the issue seems to be Blender being unable to render the pixel textures itself. When I apply the texture itself onto a new file and apply it on a default cube, the problem still exists. The addon and the geometry nodes function as required. So far I have pinpointed the issue down to the texture size itself, as using other images with the same dimension replicates the same issue.

Applying the same texture in a new file on a simple cube has the same issue as well. The original file only has a singular UV map

Answer 1

"**The smaller version, however, when applied, works perfectly. I am wondering if this is due to my hardware . . . **"

A 14304 x 16 pixel image is 228,864 pixels, which is even less than a 512 x 512px image at 262,144px. So I don't think it has any thing to do with your GPU.

It looks like it is more to do with having more than 1 UV map for the cube. Your first screenshot is showing that the UV's for each of the cubes faces are mapped to a 2 x 2 pixel square in the UV editor instead of the 16 x 16px they should be mapped to.

I don't know anything about the add-on that you are using but I would suggest that you check how many different UV maps are being used for the cube. In the screenshot below you will see that my cube has the option to use 2 different UV maps and the rest of the Blender is set up to display something like in your screenshot,the UV editor is showing that the cubes faces are mapped to 16x16px squares but in the 3D viewport the cubes are displaying only 2x2px images.

The correct UV map was selected from the list but because the little camera icon for that UV map was not selected it is using the other UV map in the 3D editor( Camera icon selected = Active in Render. Set the UV map as active for rendering)

If we now select enable the camera icon for the correct UV map then the cubes faces will display the correct 16x16px mapping of the image texture.

A second option would be to connect up a UV Map node and select the correct UV map from there.

And just to show how the other UV map has the cubes faces mapped to 2x2px squares in the UV editor:

I am hoping the above will help you sort out what is going wrong when you are using the Joey C's BlockBlender addon.

When opening your defaultcubeminecraft.blend file everything is displaying on the cube faces as expected. Only thing a little strange is that the Minecraft image squares are not 16x16px but 14x14px and each image square is overlapping its neighbour! See screenshot below :

Looking more closely at your screenshots 2 are showing correct 16x16px squares being used but one of them is like the one you packed in this .Blender file, 14x14px, 1px transparent strip top and bottom and with the overlaps?