Reply To: Adding vertex groups cause Blender to lag in Render Mode/BLENDER RANDOMLY LAGS WHEN IT WANTS. WHY does Blender do this?
Forum Archive › Adding vertex groups cause Blender to lag in Render Mode/BLENDER RANDOMLY LAGS WHEN IT WANTS. WHY does Blender do this? › Reply To: Adding vertex groups cause Blender to lag in Render Mode/BLENDER RANDOMLY LAGS WHEN IT WANTS. WHY does Blender do this?
The main problem I see is the memory. Your Available Physical Memory is only 2.61GB at the time you ran System Info. Your file loads up with 0.78GB. Depending on what you do the Undo can easily double that in just a few changes. If you just switch to material preview or render view that jumps to over 2.3GB. This means your system will start using Virtual memory which it’s already using 38+GB with 28+GB in the slower page file. As for dream 10 file, it has 1 million faces more than dream 7. Both of them have 220 material slots that aren’t being used. You can free up memory by closing down other programs and background processes. Vertex groups can slowdown system with slower CPUs, but yours should be able to handle it.
My suggestion to you is to work in linked layers. Get the extension Edit Linked Library. Basically you break it up into smaller Blend files. Like first floor, second floor, outside, etc. Maybe do the walls or main structure as a separate file. You can link in the main structure as a scene. Then in the scene of the working blend file(Where you build/layout the furniture, paintings, etc.) go to the scene tab under scene panel set the linked scene as the background. If you have the Extension you can select a linked object and under edit library’s panel(It’s on the n-panel under Item tab) Click Edit Library button. Make sure Auto Save is checked so it saves your current blend file before switching to the Linked object’s blend file. Make your changes and then under the edit library panel click return to original. Again make sure auto save is checked so that the changes are saved. This way you don’t have to remember which blend file the linked object is in. This is especially useful when you have a lot of blend files. By working with smaller parts and using Linking this will reduce the amount of memory used by the blend file and by undo. Then you can use collection and break things down to more objects instead of using vertex groups for layered selection.
When I was on an older system, I switched to Linux which ran Blender a lot faster, because it didn’t waste my memory and CPU running so many background processes. Just an FYI in case you have every thought about using Linux. Note: It was a dual core AMD Athelon II. I used it until a year ago when I finally saved up enough to buy a new system.