Depth Maps from SU
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It wouldn't bother me to move it to post-processing. Jackson, do you mind?
(You're right, incidentally, we should call the bug the "horizontal plane error"...that's more accurate since I don't use SU's ground plane either.)
poster-Lewis Wadsworth
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Moved.
Jackson
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Hi Lewis, you are a busy guy.
I get both "the edges bug" and "horizontal plane error".
I tried this depth map thing a while ago and immediately I encountered the above problems.
Then I figured this cannot be done, but look at what you guys accomplished here...
I downloaded and used Lewis's style setting but got the same problem.
It could be my videocard problem (I use GeForce though).
There might be some workarounds for "horizontal plane error", but those edges are very difficult to get rid of.BTW I found a nice tutorial of how those depth map should be applied to the original image.
This should save some of Lewis's time.
http://photography-on-the.net/forum/showthread.php?t=102294Did you ever find a setting to get rid of edges, jackson?
poster-takesh h
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Takesh,
I must admit I've been too busy with boring stuff to have another go at doing these depth maps- I keep meaning to create a Style which incorporates the right settings. I didn't worry too much about the lines as it didn't have much of an effect on the blurring (as it bled over the lines anyway). I'll try to have another go at this this week.
Regards,
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Takesh,
I've received your message and I sent you my test model. Let me know how it goes.
You know what's odd? I've been using VRay a lot lately, and the quality of the depth mask it produces from an SU model (assuming we have no extraneous lines or whatever) is not better than what happens with this direct SU "cheat."
--Lewis
poster-Lewis Wadsworth
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Thank you for your sample model, Lewis.
I never imagined it was that big... the 18MB almost killed my PC.
Now I know what I did wrong. I turned "use sun for shading" off.
I discovered that either "shadow" or "use sun for shading" has to be on (even with both on, I got the same result).
IOW the sun has to be there somehow, but shadows has to be erased by setting "dark slider" to the most right.
Doesn't make much sense to me but it works.poster-takesh h
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Glad to help, takesh. For some reason I didn't get a notification that you had responded to this thread...so ignore the email I sent you asking if you had received the models.
--Lewis
poster-Lewis Wadsworth
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Good thinking Lewis, thanks for this.
Mike
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nice!!! such a great info.. thanks all
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I'm sure someone's already thought of this, but this just struck me. Another cool use for this technique... you can use your 2d export as a displacement map in your favorite rendering program.
Here's an example of my test depth map in plan view with camera set to parallel projection(very quickly modelled terracotta roof tiles
and the output when rendered on a single plane with it in the displacement slot and no diffuse:
and the output when rendered on a single plane with it in the displacement slot and a diffuse color map:
fun stuff!
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This is really cool and I'd love to use it but the rendering program I'm just trying to familiarize myself with does not support displacement maps (yet?).
Howeve your image can also be used as a bumpmap (which certainly will give a "poorer" result - especially at the edges). -
VRay has Displacement and Bump maps.
http://www.asgvis.com -
@spaceman said:
VRay has Displacement and Bump maps.
http://www.asgvis.comYes, and if you had read the entire thread you might have noticed that I brought that up.
Most of the other plugin renders do as well, as do the dinosaur modelers like Max and Maya or oddities like Piranesi and Blender.
But isn't it nice that you don't always need them? SketchUp has the capability without plugins or additional software.
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hi,
i found this tutorial on you tube.
i was wondering which version of photoshop is required: mine is 7.0.1 but it doesn't have "lens blur", it has four or five kinds of blur but not this one. -
oooh, i'm going to have fun tinkering with this tonight...
that said some of the links are dead.
pav
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@julius said:
hi,
i found this tutorial on you tube.
i was wondering which version of photoshop is required: mine is 7.0.1 but it doesn't have "lens blur", it has four or five kinds of blur but not this one.somebody's goning to answer? which version of photoshop is required to have "lens blur"
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My cursory search of the internet suggests it was released as a new feature in CS.
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Remus is correct...it appeared with the PS CS versions.
However, you can achieve the same effects by using the "depth mask" as an alpha channel and (depending on what you want to do...make the near blurred or the far blurred) simply use Gausian blur to throw the area "out of focus." In fact, this will also work with other image editors such as GIMP (which incidentally has a Gausian filter capable of finer tuning than Photoshop's).
The Photoshop CS lens blur filter complicates matters needlessly. I almost never use it.
Incidentally, once you have a depth mask as an alpha channel, you can control its relative strength using Levels on the channel. Want things to get blurry real fast, as if you used a telescopic lens? Increase the contrast in the depth mask channel.
I also use depth mask channels to simulate the watercolorist's traditional "atmospheric perspective"--in other words, things that are far away are more gray (desaturated) compared to foreground objects.
If I have a little time later today I'll post some examples.
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