Possible problem running AC3D under Windows 11?

[Terry Capps]

I recently bought a new Windows10 computer (that was Windows 11 upgradable) and then upgraded it to Windows 11. Later I downloaded AC3D and started "playing" with it. I found that the functionality of the "Select through" function's behavior had changed from the way that it worked under Windows 10.

Under Windows 10:
With "Select through" turned OFF, a left-mouse click on an object selects that object. A left-mouse click on a surface selects that surface. A left-mouse click on a vertex selects that vertex.

Under Windows 11:
With "Select through" turned OFF while in Object Mode, a left mouse button click on an object does NOT select the object. Dragging the left-mouse button selection over the object also does NOT select the object.

In "Surface Mode" and an object consisting of a cube: With "Select through" turned OFF, a left-mouse click on one of the surfaces fails to select anything. With "Select through" turned ON, a left-mouse button click selects the immediate surface under the pointer.

In "Vertex Mode", with "Select through" turned OFF, a left-mouse click on on a vertex does NOT select the vertex. Dragging the left-mouse button selection over several vertices doesn't select any of the vertices.

Is this a problem involving AC3D under Windows 11 or am I missing something?

[Andy]

It's probably the graphics card settings which are applying anti-aliasing by default.


Look in the Windows Control-Panel for a setting that is doing this.

[Terry Capps]

My system didn't come with a way to adjust for anti-aliasing so I Googled anti-aliasing and "Intel UHD graphics 630" (graphics system my computer) and found that I needed to install the "Intel Graphics Command Center". I installed it, activated it, and selected the ac3d program as a "game". This allowed me to get to the Custom Settings and Optimizations where Anti-Aliasing and Anisotropic Filtering can be adjusted.

I turned the Anti-Aliasing OFF and then ran AC3D, but the problem still manifests itself. I tried restarting my PC and then ran AC3D again, but the problem is still there. I also tried turning off the Anisotropic Filtering, just as an experiment, but that didn't help either.

[Andy]

Can you set it as not-a-game? It's probably still doing the aliasing with that setting.

[Terry Capps]

I installed an NVIDIA GeForce GT220 graphics card and now AC3D is working
just fine. Apparently the problem is a characteristic of the Intel UHD Graphics 630
system that came with the computer.

[Andy]

Great - nVidia is the best. I've found that that their OpenGL libraries are much more reliable than other cards.