Topics

1

General / ray tracing with > 20 millions facets ?

« on: October 24, 2023, 12:44:53 PM »

Hi,

I've created many photogrammetric models with Metashape. Some are of the order of 10 million facets, others 150 million facets or more. Now, I want to calculate ray traced renderings. I have no problem importing 10 million facets into Blender, but even the latest versions of Blender crash above 60 million facets, for example. I can of course decimate the models, but I lose rendering finesse & nuance.

Do you know a way of importing so many facets into ray tracing software? Do you know of any software capable of rendering models with over 100 million facets without the need for real time rendering ?

Bests regards, David.

2

Feature Requests / ray tracing rendering

« on: October 24, 2023, 12:24:29 PM »

Hello, can you add ray tracing rendering with, for example, simply a distance-adjustable light source? This rendering feature would be useful directly in metashape, as ray tracing software often fails to process more than 60 million facets. bests regards.

3

General / animation point of focus ?

« on: June 19, 2023, 02:35:30 PM »

Hello,

When editing the cameras track of an animation's camera path. Is it possible to change the direction of the focus point to obtain a more plunging view ? for example, a view almost perpendicular to the box  You can change the height and location, but what about the direction ?

Kind regards, David.

4

General / Perspective axonometric isometry, stereo parallax experience ?

« on: June 17, 2023, 12:57:41 PM »

Hi,

I'm creating animations on a 3D model in MetaShape. I want the rendering to be as close as possible to what we see with the naked eye. I'd like to check with you that the perspective calculation value of the default view of 30° corresponds to axonometric isometry https://en.wikipedia.org/wiki/Axonometry#Special_axonometries ? I haven't found the information on the perspective projection formula used for the view in MetaShape, but I assume it's axonometric (parallels seem to remain parallel, a round sphere is projected as a round circle) and not conical perspective, which is more like what we see with the eye ?

Rendering is obviously better in stereoscopic 3D. The parallax value for a stereo view, I assume that the value refers to the closest plane foreground represented ? or the center of the box ? The comfort value for the brain is between 2 and 3° for stereo reproduction on a standard-size PC screen.

What is your experience of the variation of these parameters in rendering ?

Kind regards, David.

5

Bug Reports / v2.0.2 Tweaks BuildDenseCloud/max_neighbors / pm_max_neighbors NOT FOUND

« on: May 17, 2023, 05:11:12 PM »

Hi,

I use version 2.0.2 to fix the ASSERT problem of the neighbors.

By default the calculation of the dense point cloud uses 100 neighbors at most. When I try to increase this value by preference -> advanced -> tweaks, the values BuildDenseCloud/max_neighbors / BuildDepthMaps/pm_max_neighbors parameters IS NOT FOUND.

What are the new parameter names please ? Do you have list ?

bests regards,

6

General / Automatically remove shadows and dim areas from calculations ?

« on: April 27, 2023, 06:26:55 PM »

Hi,

I would like to make a 3D model of an object that has a lot of shadows all around on its rough and rugged surface. The object was in motion with fixed lighting but there is a great variety of shadows.

I want to remove these shadows for the calculations. For this I use "magic wand" with a tolerance of 30% for example and I click in the shadow, right click "Add selection" to define an exclusion mask. But the manipulation is very long on the number of photos.

Do you know a trick to remove the shadow areas and therefore the dim areas on a photo, typically that all pixels < 50% max lum are not taken into account in the calculations ?

Do you know if we can use and control the magic wand in python ?

All the best,

7

Bug Reports / Markers do not appear on an imported PLY. Impossible to align 2 chunks Calc2Imp

« on: March 07, 2023, 01:06:28 PM »

Hello,

I did not find an answer in the forum archives.

I want to align a calculated model in a metashape chunk to a PLY model imported in a metashape chunk. The PLY chunk not appear referenced R/T.

I can easily create markers on the calculated model and view them. But on the other hand, I can create markers on the imported PLY model (right click they appear in the chunk in the Marker folder with their coordinates), but they do not appear on the imported PLY view.

Moreover, when I align the chunks by markers, the chunk of the imported PLY is not available, it is grey.

is there a method or is this a bug?

Thanks for advance,

8

General / Produce a Tiled Model with LIDAR dense cloud and is DEM texture ?

« on: February 14, 2022, 09:14:38 PM »

Hi,

With MetaShape, is-it possible to produce a Tiled Model from LIDAR dense cloud EPSG referenced (or Mesh calculated from) and DEM blue-red palette as texture (GeoTIFF calculated with dense cloud or Mesh) , without Photos align process ?

Thanks for advance.