Converting SkyBox to Sky Sphere Cubemap Texture


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A quick guide in converting your 6 texture skybox to a single cubic map for sky sphere.

Setup:
East (Back) South (Right) West (Front) North (Left) — Flip Vertical each.
Down and Up — Flip Horizontal each

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then create your sky mesh, in the setup above it is configured to texture a Sphere primitive preferably low poly for optimization.

sky = CreateSphere(5) ; low poly sphere
ScaleEntity sky, -1000, -1000, -1000 ; scale and flip
EntityTexture sky, LoadTexture("sky.png", 128 + 256) ; cubic environment map and load in vram
EntityFX sky, 1 + 8 ; full bright and disable fog
markcwm commented:

Hi Ron,

Thanks for this. I didn't realize you have to flip the poles horizontal.

BlitzCoder commented:

Hey Mark, yes this is actually for a quick setup or lesser code using negative scaled or flipped Sphere primitive without the usual and manually building the quads.

I recently found this out while testing out some optimization techniques and trying to find a simpler way to setup skybox with cubemaps code wise.

I can't find any quick way or reference except for the SetCubeMode example which does the common 6 quad cube setup.

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