April 23, 2022 Linh Nguyen

Rotating and flipping textures in Blender

There are many 3D modeling software programs available, many are good and are doing their jobs quite well, but they all come with a hefty price tag and high subscription fees. There is no need to pay heavy subscription fees when you have a free and powerful 3D creation tool at your fingertips, known as a Blender. Blender is a popular and open-source 3D creation software that can be used in 3D printer designs. There are many times in Blender where we will need to rotate and flip textures. In Blog’s Today, we will explore “Rotating and flipping textures in Blender“.

1. Overview about Rotating and flipping textures in Blender

When you rotate an object, it moves left or right around an axis and keeps the same face toward you. When you flip an object, the object turns over, either vertically or horizontally, so that the object is now a mirror image. When you’re UV unwrapping in Blender, it can sometimes happen that a texture doesn’t show the way you had intended it to. Instead it may appear rotated or mirrored (flipped). Take the above example of a simple frame with a picture in the middle. When you originally added the texture file after unwrapping, the crab was displayed upside down, like so:

2. Fixing rotated textures and mirrored textures in Blender

To Flip a texture in Blender:

  • Navigate to the shading workspace
  • Connect the texture’s vector through a mapping node
  • invert the scale values of the mapping node to flip the texture

To Rotate a texture in Blender:

  • Navigate to the shading workspace
  • Connect the texture’s vector through a mapping node
  • use the rotation axis values to rotate the texture

It’s very easy to fix rotations: select the faces in question (either in the 3D view or the UV view), then hover somewhere inside the UV view and use the standard rotation command: R X 180 (followed by return). This will rotate the selected faces by 180 degrees, turning them upside down. Blender may also flip or mirror textures when packing islands. We can fit this phenomenon with the scaling command: S X -1 (followed by return). This will scale our selected faces along the X axis and inverse-stretch them, thereby flipping the image.

Notice that the UV map as such does not change visually, nor should it: we want our texture to remain in the same place. Also, when issuing those commands, make sure you position your mouse inside the UV view, NOT the 3D view – otherwise you’ll change the actual geometry instead of the UV coordinates.

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Thank you & Happy Rendering!

Source: versluis.com

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