I've started to render all my images with new settings that finish rendering in less than an hour or so depending on your computer.
I'm not sure how this works with very grainy images but with images with the grain that stays close to the image, the rendering settings work.
-I set the size to 2000x1500
-The quality would usually be 100-200
-Filter Radius: 0.4
-Oversample 1
-5 strips
After the rendering is done, the image should look like it was rendered at a very high quality. Then I'll resize the image back down to 1600x1200. The image should look clear after the image is complete.
If this doesn't work for you, please tell me, I haven't found an image that I've made that these settings haven't worked for.
I'm not sure how this works with very grainy images but with images with the grain that stays close to the image, the rendering settings work.
-I set the size to 2000x1500
-The quality would usually be 100-200
-Filter Radius: 0.4
-Oversample 1
-5 strips
After the rendering is done, the image should look like it was rendered at a very high quality. Then I'll resize the image back down to 1600x1200. The image should look clear after the image is complete.
If this doesn't work for you, please tell me, I haven't found an image that I've made that these settings haven't worked for.