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Messages - kirk

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Thanks,  Alexey

I have 700 24k images  aligned and depth map build for them . I suspect that hi res mesh I would like to build  for displacement baking  would take forever.  Is there a way to make a smaller crop without starting the whole process from a beginning? 

General / What's a right strategy for big subjects exeeding RAM ?
« on: June 06, 2021, 12:48:01 PM »
  I tried to do muiltiple chunks before  but it gives you kind of overlapping geo.    And matching chunks was a kind f issue too.     Is there a new right way to do it  now with only depth map method ?

And how millions of polygons or  I could expect to  squeeze from a single chunk  having only  32 gb of RAM ?

General / Re: Should I build dence point cloud at all now?
« on: June 04, 2021, 06:36:31 PM »
In 1.7 the depth maps catched up to the dense cloud resolution (dense clouds used to be considerably sharper than depth based results).

My last test was in current 1.7.1 standard version.   Is there any special tweak to increase sharpness?       Again,  am not absolutely sure , after all it's pretty close to Reality capture, maybe just  random fluctuation.

I tried delighting in Alchemist on an imported photo a half year ago and got an impression it does just a bit more advanced hi-pass, nothing more.   I clearly saw typical shading hallo around contrast edges.    Am I wrong and they advanced  it since?    That's another thing to compare.    I happen to obtain a licence before they went cloud only.    it works with RAW or exr files and do quite a nice job except  small/tiny detail shadows  which are always  still there.  And it  works well on source images only.    On final texture , even build with HDR option it leaves shadow ghosts anyway and works not that good at all.

Texture De-Lighter / Re: Delighting high poly or low poly mesh?
« on: June 04, 2021, 11:50:59 AM »
I am also curious about same thing .  Would it work same good  if I build  lower res , kind of lod02 mesh?   And how much lower  it could still work fine?    Would normal map texture in fbx  be of any help? 

Texture De-Lighter / I still see shadow ghosts ?
« on: June 04, 2021, 11:44:10 AM »
 From strong contrast shadows .  So I have a few questions:

1. Should I do as much  shadow/light  pointing accross all the model  as possible or it's enough to make just a few.    Somehow I don't se more s better.

2. Should I build  preview for "cast shadows"  first then  full res?

  With preview I get very shadow less result but  low res texture . if I then do "remove cast shadows"  it does it even better  but still low res texture.
  If I do  "remove cast shadows"  straight to full res I get kind of so-so result on my 25 mil mesh  and 11 UDIM 4096 textures .    All the shadows are still there  , just faded  and of low contrast.   After repeating it again  it's a tad bit better  but nowhere as shadow less as on my initial  low res preview. 

So what's right way?

General / Re: Should I build dence point cloud at all now?
« on: June 04, 2021, 11:27:25 AM »
    Couple years ago I did a 400 mil mesh  comparison  Reality Capture vs then Photoscan   with dense cloud/height field method  and got an impression Photoscan makes a bit of more hi-res mesh.  I recall I saw a tiny veins in fallen leaves around rocks from my foveon matrix camera and Reality Capture had filtered them out or something.   

Now I did another test  on another subject with depth maps only and it looks a bit other way around.  Might be just an illusion or some filtering settings.  It's very close  actually.

Still I wonder If dense cloud /Height-field   could provide better result ?  It  takes more time obviously, sometimes forever,    but I wonder what method would  allow to squeeze some extra  crispness? 

General / Re: Should I build dence point cloud at all now?
« on: June 03, 2021, 09:13:19 PM »
Thanks Paul.   for the explanation

General / Re: Should I build dence point cloud at all now?
« on: June 03, 2021, 03:23:01 AM »
I imagined this was due somehow to doing drone-based photogrammetry.

Wonder how it's related?  Not good enough photos from drones?   

General / Should I build dence point cloud at all now?
« on: June 02, 2021, 11:05:50 PM »
I see I can build a mesh from depth maps .  So for a best quality possible is it necessary to build dense cloud ?   
 Would it provide extra details if I do the mesh using depth maps anyway?
   Maybe I just need to do the depth maps in higher quality and that's all?

General / Null point cloud?
« on: September 04, 2020, 04:50:24 PM »
Why I see this error: Null point cloud     when  trying to build a mesh from imported  pts point cloud? 

Feature Requests / displacement/ height map baker
« on: September 04, 2020, 04:10:52 PM »
I would love to see some height map baker integrated in Metashape. The way we could import retopo model  and bake height/displacement UDIM textures instead of dealing with super hi res meshes.

General / Re: PTX import?
« on: September 04, 2020, 04:06:56 PM »
Is it working now?  in 1.6.4?

General / Re: PTX import?
« on: July 20, 2020, 01:23:24 PM »
Hello kirk,

Does it happen with any PTX file? Is it reproducible, if you export PTX file and import it back?

It imports nothing from a ptx file.    I just get zero points , nothing to export  .   Not region  related

Neither  for a specific ptx file .    Just any ptx I'v got from  LIDAR scanner.    Older version worked just fine

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