it needed more samples to do what your asking of it with a threshold of 0.01. in your first settings you only had 4, your limiting vray to much with that. Those red spots are so you how many samples it's using to clean up your image, for example the red spots are using the highest number you set (24) and the blue will be using the lowest (1) since we added a number of 24 your going to have 24 colors going from blue to red in your sample rate render element. Now your high subiv settings in your image sampler is also way to low.
I can guess that your sample rate render element will be mostly red where as you want it like the image above, only red on the extreme contrast spots. if the brightness of any colour (RG or has a difference more than 0.01 it will try to sample it and smooth them out (anti alias) but 0.01 is really not much of a difference so it'll be almost sampling everything. This number controls the difference between each pixel. Firstly increase your high subdiv number to 24 (i'll explain in a second) you can make it work less by increasing the threshold number from 0.01 (this is crazy high by the way) to anything between 0.01 to 0.2. You'll get this, basically you want your image sampler to work less and only in the right places. Once your render finishes check out your sample rate in the vray frame buffer. your image sampler is pretty much your render quality settings so getting this part right is crucial. This is going to show you a heat map of how much work your DMC sampler has to do. go to your render elements tab and add a "sample rate" and render again. Hey man, I'm going to pick apart your settings a bit if you don't mind.įirst off turn off anti aliasing, it's not like game anti aliasing where it cleans up jaggies it's almost just a sharpen in Photoshop.