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Ok, I no doubt did this incorrectly but I manually arranged my unwrapped UVs (after Smart project) onto my linear laid out skybox image - on the whole I need some pointers as to whether Im doing this right, but what I did was per Cycles - Skybox using 6 projected images (im in cycles)-

I unwrapped my image onto a cube and subdivided into a sphere:

enter image description here

And just made it huge. My issue is, packing islands gets me this:

enter image description here

And I have an issue with the margins between the islands, which creates these seams clearly:

enter image description here

Whats the best route to optimize this skybox here/get rid of the margins neatly?

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  • $\begingroup$ For rendering skyboxes, I just set up the camera to be square with a FOV of 90deg exactly, go through six frames of animation, and render each face as a separate frame. I think I've done this with Unity too with no problems. $\endgroup$ – Tavi Kohn Jul 9 '18 at 8:35
  • $\begingroup$ Could you elaborate on the blender version of this? Are you talking about spinning the cube or what? $\endgroup$ – skyguy Jul 9 '18 at 11:36
  • $\begingroup$ Instead of having a cube, have a camera in the center of the scene and "take pictures" in each direction (one image per cube face: up, down, left, right, front, back). This gives you rendered frames that can be applied as individual faces of the cube map. You don't actually need a cube in your scene, you're just using the main camera. $\endgroup$ – Tavi Kohn Jul 10 '18 at 3:13
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I like to create skybox with uv sphere, it's simpler and easier. Do a quick search on youtube on how to create skybox in the blender that you learn in 5 min.

It will look good like this: enter image description here enter image description here

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  • $\begingroup$ No - I need to use this image/cube mapped. Its already plugged into Unity, not going to switch back and forth $\endgroup$ – skyguy Jul 8 '18 at 18:11
  • $\begingroup$ Do not use subdivision surface. Cubic mapping has to stay as it stands. And apply shadeless on the material to keep out dark corners. $\endgroup$ – Elektro Javorski Jul 8 '18 at 20:49
  • $\begingroup$ Ok, thanks but doesnt fix my problem with those seams $\endgroup$ – skyguy Jul 9 '18 at 7:59

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