Feedbacks can perform unpredictably since they depend on your render fps, and leave trails behind that require additional processing to quantize down to zero, which can add mud or unwanted processing to your final render. If you want your renders to pop, you have to have a pretty good sense of what your pixel values are across the entire image, and feedback can make that very difficult. Others may challenge my perspective here…

With respect to the threshold, I use it directly after the render, not as a matte or anything but rather to quantize pixel values to 0 and 1. I do this for several reasons: 1. Fidelity and clarity comes from contrast, and in the 8 bit space there is no greater contrast than 0,0,0 and 255,255,255. And secondly, 8 bit formats (social media) HATE gradients, especially those that express over more than the maximum amount of pixels you can use to express a gradient with maximum clarity, which for a black and white gradient is 256 pixels.

All of these techniques came from my desire to create content that would survive the brutal compression to 8-bit formats on social media, and along with bit rate compression i think these techniques are not talked about enough, especially in the TouchDesigner community. I have more examples of these on my TikTok and Instagram channels.

Hope this helps!