3ddd is not responsible for this extension. All risks associated with the use of this extension are borne by the users.

SelBridge addresses one of the main problems of 3ds Max — the accurate transfer of complex masks and selections on heavy 3D models. The script allows projecting selections of vertices, edges, and polygons considering the camera angle, handling meshes with hundreds of thousands of polygons without a loss in performance.

Tested on 3ds Max 2022/2024.
Supported versions: 3ds Max 2016 and newer.

Installation:

1. Drag the script file into the open 3ds Max window.
2. Go to Customize -> Customize User Interface -> Toolbars, select the d3ero category.
3. Drag the SelBridge button onto any toolbar.
4. The file contains detailed instructions.

Main advantages:

The script easily "digests" heavy models (over 500,000 polygons on the mask and target on an average PC - 1.5 min). The math is calculated by a compiled core in memory in batches.
The script captures vertices strictly according to the pixels of the mask.
All the heavy lifting is done on the vertices, after which the script instantly expands the selection to edges or polygons using native 3ds Max algorithms. Your Soft Selection settings are carefully picked up and transferred.
The script does not break anything. The projection result is neatly baked into a new Edit Poly modifier on top of your stack. During calculation, the script temporarily disables TurboSmooth to avoid topology shifts and restores it afterward.

How to use:
The interface is divided into logical steps. Specify a flat object as the "Source," select the target 3D models in the viewport, adjust the filters, and click "Transfer Selection."

- UV Unwrap to Mesh (UV -> Morpher): The built-in one-click algorithm will create a flat 1:1 copy of the model based on the UV layout (Channel 1), automatically cuts seams, and applies a Morpher modifier to the original. An ideal canvas for creating a mask.
Screen Space Projection: Visual transfer (Screen Space Projection). Transfers the selection exactly as it appears in your viewport considering perspective.
Exact topology: 1-to-1 transfer by indices. An ideal option for morph targets, blocking unnecessary adjustments.
Select the entire object: An ultra-fast object isolation algorithm. If you are transferring a mask to an array of thousands of small details, touching the mask with at least one point will instantly select the object.
Morph target search: Automatically scans the scene and finds all models with an identical number of vertices, ignoring smoothing modifiers and hidden layers.

❗️ Important rule:
For the "Screen Space Projection" mode, the camera angle is crucial! The selection is projected considering your perspective (the camera vector to each polygon is calculated separately). Before clicking "Transfer," ensure that the flat mask visually perfectly overlaps the geometry of the target objects on your screen.

If you have questions or issues with the script - write to us, and we will figure it out!
I would appreciate your feedback!

3DSKY is not responsible for this extension. By using it, users acknowledge and accept all associated risks