Following the coffee tutorial, managed to get it working, but now, all of the sudden it seems that part of the liquid is not behaving the right way, anyone know what might be the issue here?

Old Version Old Version

Current (not properly rendered, but you can see the liquid problem) enter image description here

Blender File: https://drive.google.com/file/d/1hXLEOCWLCKjAbXKdkr0q7BzOxh2g480f/view?usp=sharing


1 Answer 1


The normals on your cup object are flipped inside out. You can see this by selecting the “Face Orientation” viewport overlay, which displays the front side of faces in blue and the back side in red:

To fix this, in Edit Mode, select all your cup’s faces, then press ShiftN to recalculate the normals so they point outside the mesh. This fixes the rendering issue.

  • $\begingroup$ Yep. Definitely the problem. I did the same and it works now. $\endgroup$ Apr 18, 2021 at 0:53
  • $\begingroup$ Awesome thanks @Alexis King, it fixed $\endgroup$
    – gqmonteiro
    Apr 18, 2021 at 1:22

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