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Problems with HDR Skies

HaddixxHaddixx Posts: 90
in New Users

I'm having a problem with HDR skies.  I'm constructing a shot looking out across the ocean and want to include an HDR sky.  Ideally the HDR sky would go down just to the horizon and the terrain in my scene would extend far enough so the two would merge seemlessly. The first attached image shows my problem.  The HDR sky used is from the "HDR Iray Sky Add On for TerraDome 3" - which produces great results IMHO.  But, there is brown strip above the water (the water is part of the scene) and the sky part of the HDR sky.  It looks like this is because the lower half of the HDR sky image has a section that is supposed to be earth, I think?  The second image is a portion of the HDR showing the sky on upper half of the image and ground on the lower half of the image.  Is there a way to shift the HDR sky to align the horizon in the HDR sky image with the horizon in my scene?  I thought the "Ground Origin" settings in the Render Environment Tab would be the solution but I can't seem to get it to work.  Is there another solution?  I've tried other HDRs but all that I had found are made from real photos and have trees, structures, or mountains on the horizon and don't work when you are trying to create a scene like mine looking out across the water to a flat horizon.  Any help would be greatly appreciated.

Secluded Island - TerraDome Sky.jpg
1920 x 1440 - 958K
FluffyCumulusSky__hdr_preview.jpg
512 x 1000 - 79K

Comments

  • SixDsSixDs Posts: 2,384

    I'm just guessing here, but from what I see in the screenshot, your Dome is larger than the plane used for your water surface, thus exposing the ground in the HDRI. Am I correct in assuming that it is just the HDRI from Terradome 3 that you are using in with the DAZ Studio Iray skydome? If so, you may want to try the tip by Havos - the last post at the bottom of this thread:

    https://www.daz3d.com/forums/viewreply/825818/

  • HaddixxHaddixx Posts: 90

    Interesting thought SixDs.  Is there a way to shif the dome up/down or decrease the size of the dome?

    I can give the tip from Havos a try but I am sceptical as the HDR I am using isn't a half-dome image.  It has the ground as part of it.  If I increase the canvas size that would just shift everything up, including the brown/ground portion of the HDRI, wouldn't it? The HDR I am using is from SF-Design but is made from the TerraDome 3 set.  If you have scenery on the horizon (like mountains) the brown/ground part of the HDR isn't visible.  It's only when you have a clean horizon, like a beach scene, that this becomes a problem.

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