This is version 4.8 UV Material Transfer 

Recent upgrades and revisions:

• Added UV transfer
• Proxy by face count from selected objects

• Material transfer to proxy

• Clean UI

• Faster addon

Latest Update-9/12/2024

In Blender and other software, we always count by factors that range from Vertex count, shaders, additional animation and or keyframing that slow down the viewport's capabilities.
What if you had a program (Plug-In/Add-on) That could alleviate 70 to 90% of that memory usage temporarily, so you could focus on lighting, and placement which are more important. You can use Camera culling or instances all with one node group, or you can use "OCP" One Click Proxy addon!
One specific review from a valued customer, Blender-Head stated, "I had around 3 million Verts in my scene and your addon reduced it to 800 and I was able to work on lighting in a sensible way, and get my work done faster, Check the review on Blender Market. ***** Stars
The "OCP" One Click Proxy addon, gives you a big advantage for scenes with loop logic that targets either "ALL" objects in the scene or "Selected" based on 1 easy setting and adds a geo nodes modifier to each object with the options for multiple different proxy types.
Different proxy types like, Bounding Box, and "Convex Hull" which naturally will be closer in shape to the original object.
Or! You can use a custom object you choose and scale individual objects or all OCP objects at once. But it gets better!
You can transfer the original material to the proxy for lighting and scene recognition. Oh, it gets even better!
This whole thing is powered by "Is Viewport logic" and you can do preview renders, and the proxies will not show up, except objects in wireframe mode!
There is an experimental UV transfer to all of the Proxy instances, but it will not affect the original object in most cases, and by design this is used to prototype large and EPIC scenes.

12-10-2023

added a proxy scale float to the UI so you can now scale the proxy up or down

12/3/2023

 Found an extra subdivide node and removed it from the OCP node group now everthing will be proper low poly

12-1-2023
You can now toggle all Is_Viewport OCP modifiers without affecting any other modifiers or geo node modifiers

11-28-2023

wireframe / solid button was fixed and will loop with all objects

11-26-2023

Presets added for viewport display scale & a revert button

11-25-2023

List all Objects with OCP modifier added or view a single object in the list

Instance Proxy

Quick Wireframe

Bounding Box