Artifacts- Atmo appears through terrain

Started by choronr, February 17, 2009, 01:38:48 PM

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choronr

Quote from: Tangled-Universe on February 17, 2009, 04:55:08 PM
Could you also check if enabling "raytrace everything" works for getting rid of the clouds, but results in a messed up terrrain?
I will check it out. I hope it don't 'mess up' the terrain as you mentioned.

Tangled-Universe

It probably does, just want to check if this is not specific for my machine or version of TG I use.

Cyber-Angel

In the current Beta [Can Some one else confirm this, please] there seems to be instances of micro [and larger scale] holes appearing in the terrain with certain displacement values. In addition there arises, on occasion, to be ripping of the terrain to the extent that you can see the underside of the terrain. ;D

Regards to you.

Cyber-Angel
 

Mohawk20

This doesn't seem to be a ray-trace issue. In both cases the bottom of the artifacts is cut of in a straight line, presumably the artifacts only appear in two single render buckets, which would indicate a displacement cut-off issue discussed in several other places on these forums.
Still strange, and should be looked into by planetside.
Howgh!

choronr

Quote from: Tangled-Universe on February 17, 2009, 05:26:42 PM
It probably does, just want to check if this is not specific for my machine or version of TG I use.
Checked all the ray tracing; and, the cropped render indicates that now, it is even worse. Apparently this is not the fix.

Thank you C-A and Mohawk for your input. I'll be watching and trying the latest suggestions.

Tangled-Universe

Quote from: choronr on February 17, 2009, 06:07:08 PM
Quote from: Tangled-Universe on February 17, 2009, 05:26:42 PM
It probably does, just want to check if this is not specific for my machine or version of TG I use.
Checked all the ray tracing; and, the cropped render indicates that now, it is even worse. Apparently this is not the fix.

Thank you C-A and Mohawk for your input. I'll be watching and trying the latest suggestions.

I didn't say it would be the fix ;) On a contrary, like we saw both it makes it even worse.

Like Mohawk I also tend to think it is not a raytrace problem.
It could indeed be the "displacement-cutoff" problem now often reported and maybe it also has to do with a problem I had some time ago:
http://forums.planetside.co.uk/index.php?topic=3991.msg41710#msg41710

Quote from: Mohawk20 on February 17, 2009, 05:52:59 PM
...presumably the artifacts only appear in two single render buckets, which would indicate a displacement cut-off issue discussed in several other places on these forums.
Still strange, and should be looked into by planetside.

The problem occurs also when you increase the AA. The AA-setting determines the size of the renderbuckets (high AA = small renderbuckets). So if the problem area is split into more renderbuckets, by increasing AA, the problem is still there.
I'm not THAT familiar with the displacement-cutoff problem, but if that occurs only in single renderbuckets then the problem could be something else.

Anyway, they indeed should take a look at it :) Already reported it.

Martin

choronr

Thanks a bunch Martin. I will reduce the AA and see what happens. You are up extra late tonight aren't you?

choronr

Reduced AA from 14 to 6; and, the problem still exists.

buzzzzz1

Hi Bob,

Have you tried doing a small crop of the problem areas only? Or is that what you have been doing? If the small areas render complete, then you could layer them in with photoshop.  Or this might sound silly but, try moving the camera just a hair and setting it. I have had this problem in the past and it worked.  BTW, that scene is really nice, in my opinion your best thus far. 
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RArcher

I get this same sort of problem fairly often when working with some displacements.  Have never really found a good solution besides the clone brush in a post-pro program after the fact.

choronr

Quote from: buzzzzz1 on February 17, 2009, 08:31:27 PM
Hi Bob,

Have you tried doing a small crop of the problem areas only? Or is that what you have been doing? If the small areas render complete, then you could layer them in with photoshop.  Or this might sound silly but, try moving the camera just a hair and setting it. I have had this problem in the past and it worked.  BTW, that scene is really nice, in my opinion your best thus far. 
Hi Jay,

Yes, I've done the small cropped sections to no avail. I did some clone stamping in PS to fix the image; and, it looks pretty good. However, I would have tried your camera moving suggestion; but, did the PS thing before I got your message - good idea though. Trouble is, with a meta camera in for the clouds, it probably would have changed the clouds as well (with my luck, probably not for the better).

Thanks for your encouragement. I used the 'Bright Angel' terrain you once sent to me and made some changes like adding strata and displacements. This terrain has lots of possibilities.

Hopefully, Matt, Oshyan or somebody else will find a fix for this problem. Looks like they're getting close to the final version.

choronr

Quote from: RArcher on February 17, 2009, 08:58:10 PM
I get this same sort of problem fairly often when working with some displacements.  Have never really found a good solution besides the clone brush in a post-pro program after the fact.
Thanks RArcher for visiting. Yes, Photoshop or Paint.net seems to be the only way of recovering from this issue. Hope the guys find the fix.

Oshyan

That really looks like a displacement cut-off issue. Does this occur in the same places if you change the render resolution (either larger or smaller)? I'll see if development can take a look at it for any additional information.

- Oshyan

choronr

Quote from: Oshyan on February 18, 2009, 12:20:24 AM
That really looks like a displacement cut-off issue. Does this occur in the same places if you change the render resolution (either larger or smaller)? I'll see if development can take a look at it for any additional information.

- Oshyan
Thanks Oshyan for having a look at this issue. I haven't tried a change in resolution. I'll increase the image size from 1280 x 960 to something a little larger and do a cropped render of one of the problem areas to see what happens. I'll get back to you on this.

Bob

choronr

Quote from: Oshyan on February 18, 2009, 12:20:24 AM
That really looks like a displacement cut-off issue. Does this occur in the same places if you change the render resolution (either larger or smaller)? I'll see if development can take a look at it for any additional information.

- Oshyan
Hi Oshyan,

I increased the 1280 x 960 to 1792 x 1344 and the problem still exists. Then, I crop rendered to 768 x 576 and all appeared ok with no artifact. Your suggestion worked!

Any further information on this would be appreciated ...thanks again.

Bob