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Png does not work with cryptomatte, as it requires a 32bit float precision which PNG can not provide. You must use EXR in float32bit ! Blender will save out either a OpenEXR or OpenEXR multilayer. If you want all layers in one EXR file per frame, choose the multipayer option. If you wish to save out multiple EXR per pass (Diffuse, Specular, Crypto ..) you ...


You can try to connect the image (or image sequence) to the denoise node without using the Normal and Albedo sockets but the result won't be as good as it could be. In general, Intel's OpenImageDenoise is the best option for now, see how to set it up properly: How to properly connect the Denoise node in Compositor?. Alternativly, you can try using other ...


You have to switch on top row of Image Editor from your 0001.png to Viewer Node :)


Adaptive Sampling min samples is not the actual amount of samples that cycles is using to render the scene. From the manual: Min Samples The minimum number of samples a pixel receives before adaptive sampling is applied. When set to 0 (default), it is automatically set to the square root of the total (max) sample count. So, what is happening in your case, ...


Another fun way is to use AI to enlarge your render. By rendering out at a lower scale you safe time and thereby can increase the samples. I use Gigapixel AI:


I will suggest this very easy trick. Remember, this trick will only work for blender 2.81 and above. Go to compositing, and enable nodes. Then, click on add and select search and enter denoising. Then, drag the node to the middle of both present nodes. Something like this: If you are unable to find denoising normal and denoising albedo, you will find it ...

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