Someone needs to do the rendering.
Your options are:
- You do the rendering. You pay for the render servers. You have to make sure your business model is profitable enough to sustain this.
- The client does the rendering. The player pays for their local machine or console. You hace to make sure that your business model targets players with sufficiently capable machines.
Those are the options. The are no other options. However, you can adjust things like “level of quality needed” to make the client work on as many machines/devices as possible, if your worry is that “Intel Integrated Graphics” won’t be able to render your world.
However, if you don’t want to require installing software on the machine, the only option is “you do the rendering.” For the client machines to do the rendering, they need the software.
Maybe the right choice for you is to target consoles, where the control over software distribution is better. (But then, you instead have to deal with the platform owners and their gatekeeping.)