i-switched-to-blender-4-3-after-two-years-on-4-1-and-here-is-what-i-noticed-in-the-first-three-weeks

I was on Blender 4.1 for almost two years and refused to update mid-project. When I finally switched to 4.3, I ran the same three personal project types I always do — a hard-surface model, a character sculpt, and an interior render — to see what actually changed in my daily work. This is what I found, what surprised me, what annoyed me, and what I had to relearn.

🔧 Tools mentioned in this article

Blender

Free and open source 3D creation suite — completely free, no subscription

www.blender.org

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Blender Extensions Platform

Official add-on repository introduced in Blender 4.2 — free, replaces the old manual add-on installation

extensions.blender.org

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Why I Waited So Long to Upgrade

I always wait a few months before upgrading Blender versions mid-project. Not because I distrust the Blender Foundation but because my add-on stack needs time to catch up. In my case: Hard Ops, Boxcutter, Retopoflow, and a few smaller utilities. By the time 4.3 had been out three months, all of them were compatible. That is my personal upgrade trigger — not a version number but an add-on compatibility check. If your workflow depends on specific add-ons, checking compatibility before upgrading is worth the 20 minutes it takes.

What I Actually Noticed in Week One

• Viewport performance: The first thing I noticed was smoother viewport navigation on my interior scene — a scene with about 4 million triangles including instanced objects. On 4.1 this scene had occasional hitching when orbiting. On 4.3 it was noticeably smoother without changing any settings. I did not benchmark this formally but after a week of daily use the difference felt consistent.
• Extensions platform: The new Extensions platform inside Blender replaced the old Get Extensions workflow. I had been on old-style .zip installations for everything. The first time I installed a new add-on through the Extensions tab in Preferences it felt genuinely more modern. Searched, one-click installed, enabled. No zip file, no manual path. This matters more than it sounds for keeping add-ons updated.
• Geometry Nodes UI changes: Several node names and connection types changed between 4.1 and 4.3. My old node setups opened with missing links on two of three Geometry Nodes groups I use regularly. Took about 45 minutes total to reconnect and update them. Not a crisis but worth knowing before you upgrade mid-project.
• Principled BSDF update: The Principled BSDF shader has additional inputs in 4.x compared to older versions. My saved material library had no issues importing but some materials looked slightly different — specular values read differently. Went through my material library and adjusted about a third of them. One afternoon of work.

Sculpting: What Changed for My Character Bust Work

• Brush feel: I use a Wacom tablet for sculpting. The brush stroke response in 4.3 felt slightly different from 4.1 — harder to describe exactly, but the falloff on the Clay Strips brush felt slightly more responsive to pen pressure. Could be perception. Could be a real change. After a week I preferred 4.3.
• Multires sculpting stability: I had two Multires sculpting crashes in my first week on 4.3, both during high-poly smoothing passes. I had crashes in 4.1 too, less frequently. This could be hardware-specific — my 8GB VRAM runs tight at high subdivision levels. Saved more frequently, reduced subdivision level during smoothing passes, issue did not recur.
• Mask tools: The mask expansion and mesh filter updates I had read about in the release notes translated to a real workflow improvement for refining tight areas around the eye sockets and nostrils on the character bust. Not dramatic but genuinely useful.

Rendering: Interior Scene on Cycles

• Render time comparison on the same scene: My interior test scene (1920×1080, 256 samples, Cycles with OptiX denoiser) took 4 minutes 12 seconds on 4.1. On 4.3 with the same settings: 3 minutes 48 seconds. A 9.5% reduction. I ran this three times on each version to rule out variance. The difference was consistent.
• Denoising quality: The OIDN denoiser in 4.3 produced slightly cleaner results on fine detail like the thread pattern on cushions in the scene. My standard workflow uses OptiX for speed and OIDN for final frames — this judgment did not change after upgrading.
• Light Linking: This is the 4.3 feature I use most in my current work. Light Linking allows a light to affect only specific objects. In interior scenes this is enormously useful for adding fill light to a dark corner without affecting the whole scene lighting balance. Was doing this with layer hacks before. Light Linking is cleaner and faster to adjust.

Mistakes I Made During the Upgrade

• Mistake 1: Not keeping 4.1 installed alongside 4.3 for the first month — deleted 4.1 on day two of 4.3. When a client sent back a 4.1 project file two weeks later I had to reinstall. Blender allows multiple versions installed simultaneously. Always keep the previous version for 4-8 weeks after upgrading.
• Mistake 2: Not exporting my 4.1 preferences before upgrading — spent time recreating my keymap customizations, theme, and workspace layout. Go to Edit > Preferences > Export Preferences before any major version upgrade. One file saves an hour.
• Mistake 3: Upgrading mid-project on the Geometry Nodes project — the missing node links I mentioned took 45 minutes to fix on a deadline day. Now my rule is: finish or checkpoint a project before upgrading, then start the next one on the new version.
• Mistake 4: Assuming all my add-ons were compatible because the big ones were — one small UV add-on I use occasionally caused a Python error on first launch of 4.3. It did not crash Blender but it threw a console error every session. Disabled it until an update came through.
• Mistake 5: Not reading the full release notes for 4.2 before going straight to 4.3 — I had skipped 4.2 and went directly from 4.1 to 4.3. Several 4.2 changes (especially in the Extensions system and Shader updates) that I assumed were 4.3 changes were actually from 4.2. Read the release notes for every version you skip.

Is Blender 4.3 Worth Upgrading to Right Now

• Upgrade now if: you are not mid-project with complex Geometry Nodes setups, your main add-ons are already 4.3 compatible, and you do interior or architectural rendering where Light Linking is immediately useful.
• Wait if: you are in the middle of a Geometry Nodes-heavy project, you rely on add-ons that have not confirmed 4.3 compatibility, or you are on a client deadline where stability matters more than new features.
• The free software advantage: because Blender is free, you can install 4.3 alongside your current version and test it on a copy of your project before committing. There is no cost to finding out firsthand.

Final Thoughts

Seven weeks in, I am on 4.3 full time and not going back. The viewport performance improvement alone is worth it for my larger scenes. Light Linking changed how I approach interior lighting setups. The Extensions platform is a small quality of life improvement that adds up across multiple add-on updates. The upgrade friction — node reconnections, material adjustments, one add-on error — took one afternoon total. For a version upgrade on a piece of software I use daily, that is a low cost.