| Poster | : Wotan | | Posts | : 4 | | Country | : Germany | | City | : Nuernberg |
| | | | Posted by Wotan on 24/11/2009 at 16:14:26
| | First of all: Thank you very much for your amazing articles. They are not only technically good, your explanations make the techniques useably for newcomers.
Now to my question. Looking at the water on the terrain there are regions which have an incorrect reflection: It is neither the sky, nor the landscape, it is very dark.
I could not figure out what causes these artifacts. Could it be a reflection of an area beneath the sky dome? | |
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| Poster | : Wotan | | Posts | : 4 | | Country | : Germany | | City | : Nuernberg |
| | | | Posted by Wotan on 24/11/2009 at 16:19:40
| | Find below a link to an image that shows the reflection problems that I tried to describe:
http://img7.imageshack.us/img7/4294/reflectionerror.png | |
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| Poster | : Duallity | | Posts | : 289 | | Country | : | | City | : |
| | | | Posted by Duallity on 25/11/2009 at 01:52:58
| | Hi,
that usually happens when the reflection view matrix can see pass the skydome (and of cause could also happen with the refraction seeing pass the terrain).
This should only occur with a camera position like in this picture. If you move the camera closer to the terrain the shadow will dissapper.
If you want to keep the camera that way, you will have to enlarge the skydome either by changing the y-value of the size of the current skydome or by edditing the skydome model.
But of cause this will let the texture look a bit streched.
Not a perfect solution but the first thing that came to my mind. Maybe someone else has an other idea.
Greez
Duallity | |
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| Poster | : Wotan | | Posts | : 4 | | Country | : Germany | | City | : Nuernberg |
| | | | Posted by Wotan on 26/11/2009 at 05:22:23
| | It agree that the root cause of the problem is that the reflection looks behind the sky dome.
I think however that the problem also occurs when the camera is on ground level, as long as the water is long enough, so that the far end of the water is behind the sky dome and thus the reflection sees just nothing.
The only ways to solve the issue are INMHO to have only small ponds of water or to have a sky dome that is larger than the terrain. | |
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| Poster | : Duallity | | Posts | : 289 | | Country | : | | City | : |
| | | | Posted by Duallity on 26/11/2009 at 05:47:07
| | And it should only occur if you are at the end of your terrain which should never really happen in a game.
When you are at the middle of your terrain the skydome should 'cut through' the terrain and the water which makes it impossible for the refelection view to see pass the skydome. | |
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| Poster | : xMLM | | Posts | : 4 | | Country | : US | | City | : EP |
| | | | Posted by xMLM on 17/07/2012 at 16:26:31
| | | I just increased the wMatrix scale to 500 and now I have no black water issue. | |
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