Best Render Settings to Eliminate Image Grain? First things first, I'm basically brand new to Blender. I used it years ago to do nothing more than import Minecraft models, pose them, and take photos. 

Well, now I'm doing basically the same thing but I'd like to actually learn Blender properly this time and the whole new 2.8 interface doesn't help haha. So I imported a model, posed it, and when I render I'm getting a pretty sub-par image and I don't know how to fix it. Specifically in the graininess territory. I've played around with the Samples tab varying both the "render" and "viewpoint" sliders but I'm kinda stumped and would rather ask the pros.
Down below are my photos with the settings marked:





Top Pic: 128 "Render" &amp; 128 "Viewpoint"

Bottom Pic: 500 "Render &amp; 200 "Viewpoint"

I wanted both to be in 1080p for best viewing quality on here but had to limit it to 50% to keep the file size small enough to attach to the document.

If any of you have tips to improve basic render quality or even advanced tips for when I try to do animation with these rigs, I'd really appreciate it. Below are my settings for rendering. If you need me to open any of the tabs to relay my settings to you, just let me know.
The Intel Denoiser might be useful here.


Check Denoising Data in Properties Panel > View Layer
Check Use nodes in Compositor
Add the Denoise node and connect it like this


Now render your image and it will be automatically denoised.  



Note:
If you're not going for photorealism, you'll be better off using Eevee Render Engine.
It can be changed in Render Tab > Render Engine > Eevee