V-Ray 3.4 repacks are frozen in time. They do not receive bug fixes. SketchUp updates frequently (2021, 2022, 2023, 2024). A repacked V-Ray 3.4 will likely crash on SketchUp 2023 or 2024. You will find error messages like "Unable to load VRayForSketchUp.so" or "License server not found." The forums will not help you because you cannot admit you are using a crack.
If you're looking for interesting blog posts or resources on V-Ray 3.4 for SketchUp, consider the following: vray 34 for sketchup repack
Finally, consider the human cost. Chaos Group (Chaos) employs hundreds of developers, mathematicians, and support staff. V-Ray 3.4 was the result of over 15 years of R&D. When you use a repack, you are stealing the wages of the engineers who optimized that denoiser and the UI designers who built that asset editor. V-Ray 3
If you cannot afford V-Ray, use Blender (Cycles). It is 100% free, open-source, and produces renders that rival V-Ray. The only thing you lose is direct SketchUp integration, but you can export via .dae or .obj. A repacked V-Ray 3