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UberEnvironment light
Posted: 11 November 2012 03:45 AM   [ Ignore ]
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Hi there,

I have a question to the UberEnvironment light. Is there a possibillity to use the UberEnvironment light in this way that the light comes from all sites but not from below? I use the UberEnvironment light without shadow + a spot or distant light with ray traced shadow.

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Posted: 11 November 2012 05:54 AM   [ Ignore ]   [ # 1 ]
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You would need an environment map which was white (or grey) at the top and black at the bottom of the sphere

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Posted: 11 November 2012 06:00 AM   [ Ignore ]   [ # 2 ]
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As Richard said, try something like this one, block the lower half of the HDRI with black:

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Posted: 11 November 2012 04:54 PM   [ Ignore ]   [ # 3 ]
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Akhbour - 11 November 2012 06:00 AM

As Richard said, try something like this one, block the lower half of the HDRI with black:

thank you both but to be honest, I really don`t know what you mean…think I am a bit stupid for that

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Posted: 11 November 2012 04:57 PM   [ Ignore ]   [ # 4 ]
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I have the sphere (of the UberEnvironment Light) invisible in my scene also during creating the scene, the sphere itself is white, so if I understand correctly I do have to add a map to the sphere and have to make the lower half black, right?

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Posted: 11 November 2012 05:12 PM   [ Ignore ]   [ # 5 ]
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do I have to choose a shadow map like deep shadow or raytraced for the UberEnvironment light itself?

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Posted: 11 November 2012 05:14 PM   [ Ignore ]   [ # 6 ]
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No, the sphere only gives you a clue on the light position (the brighter/brightest parts of the image and is nothing more than a .jpg.
What you are looking for is the HDRI file, the one showing in the light tab of UE, should be in .tif 32bit format.

You can edit that one in Photoshop or Gimp (I think) to add a black rectangle which covers the lower part of the HDRI.

Browse to the location indicated by DS to open that file.

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Posted: 11 November 2012 05:18 PM   [ Ignore ]   [ # 7 ]
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cosmo71 - 11 November 2012 05:12 PM

do I have to choose a shadow map like deep shadow or raytraced for the UberEnvironment light itself?

You can always try to look into the shadow tab of UE!

No, just kidding, you set the shadows (if one can say so) in the EnviromentMode list of the basic settings of UE.

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Posted: 11 November 2012 05:21 PM   [ Ignore ]   [ # 8 ]
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No not the sphere as that is just there for visual purposes…I generally hide it.

Richard and Peter are suggesting to do it with a HDRI/Tif light map that Uber Envrionemnt uses to light the scene with.

BUT I cannot see how to do this myself as GIMP or Photoshop Elements won’t open the Tif light map so I can’t add a black section to the bottom. I believe the Photoshop CS range can open these files.

So I am also interested in knowing how this can be done. smile

EDIT: TOOOOO slow again. smile

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Posted: 11 November 2012 05:27 PM   [ Ignore ]   [ # 9 ]
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Szark - 11 November 2012 05:21 PM

No not the sphere as that is just there for visual purposes…I generally hide it.

Richard and Peter are suggesting to do it with a HDRI/Tif light map that Uber Envrionemnt uses to light the scene with.

BUT I cannot see how to do this myself as GIMP or Photoshop Elements won’t open the Tif light map so I can’t add a black section to the bottom. I believe the Photoshop CS range can open these files.

So I am also interested in knowing how this can be done. smile

EDIT: TOOOOO slow again. smile

This may help:

http://ict.debevec.org/~debevec/HDRShop/tutorial/tutorial7.html

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Posted: 11 November 2012 05:36 PM   [ Ignore ]   [ # 10 ]
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Yep Peter that helps loads, thanks. I went on a Google hunt and came up empty.

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Posted: 11 November 2012 05:37 PM   [ Ignore ]   [ # 11 ]
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Akhbour - 11 November 2012 05:18 PM
cosmo71 - 11 November 2012 05:12 PM

do I have to choose a shadow map like deep shadow or raytraced for the UberEnvironment light itself?

You can always try to look into the shadow tab of UE!

No, just kidding, you set the shadows (if one can say so) in the EnviromentMode list of the basic settings of UE.

so I can open the tif file in gimp but get just an image with nothing in it… a have no photoshop so it seems I have to live with postwork

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Posted: 11 November 2012 05:40 PM   [ Ignore ]   [ # 12 ]
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Follow the tutorial in my link two posts higher and it should work in Gimp.

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Posted: 11 November 2012 05:51 PM   [ Ignore ]   [ # 13 ]
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Szark - 11 November 2012 05:36 PM

Yep Peter that helps loads, thanks. I went on a Google hunt and came up empty.

you just need a half w/b jpeg for the light color map, you also can use a grey/white map or what ever you want, just made me a 1000/1000 pixel halpf black and white map and next I will try a dark grey/light grey map that works also as it seems in my first test

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Posted: 11 November 2012 05:52 PM   [ Ignore ]   [ # 14 ]
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I would try this out myself with GIMP now if I wasn’t about to hit the sack. smile Good night. I will check back in the morn to see how you got on cosmo.

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Posted: 11 November 2012 05:57 PM   [ Ignore ]   [ # 15 ]
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Szark - 11 November 2012 05:52 PM

I would try this out myself with GIMP now if I wasn’t about to hit the sack. smile Good night. I will check back in the morn to see how you got on cosmo.

just two hours then I will enter the bed, too smile

have a good night

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