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I am experiencing some strange behavior with Live Procedural Texture and the "rgbtoi" function. Perhaps I am doing something wrong, but if so, I can't figure out what it is. I'm on a MacBook Pro running Ventura 13.6.4, using AP 2.3.1. I was trying to create a Toning Preset using Procedural Textures, but the display comes out very dark, which stopped me in my tracks. Here's the original image. I picked this image because it had a lot of different colors for testing. The below image shows only the base layer (the original pixel layer). The layers above the base layer are hidden. I added a Channel Mixer Adjustment Layer and set it to grayscale and I get the expected result. It displays the weighted grayscale of the image (using approximately 30% Red, 59% Green, 11% Blue for the conversion to grayscale). Note the sample points in the Info Panel. They look about right to me and agree with the image as displayed on my monitor. Below is a screenshot with the Procedural Texture Layer visible and the Channel Mixer Layer hidden. I used the "rgbtoi" function, which I believe does a similar RGB to weighted grayscale conversion as Channel Mixer (approx 30%R, 59%G, 11%B) and provides the output as grayscale intensity. The image displays extremely dark, but the sample points in the Info Panel are nearly identical to those shown in the Channel Mixer screenshot. The sample points do NOT agree at all with the displayed image. I'm guessing it is a "display issue" because the calculated values in the Info Panel seem to be correct. If I change the Layer Blend Mode of the PT layer to Color, Hue or Saturation, the image displays the same as Channel Mixer, but this shouldn't be necessary. And for my purposes, it defeats my intention of building a PT to do Toning. I could put a Channel Mixer Layer (set to Grayscale) below the PT Layer, but that shouldn't be necessary, should it? Seems like a bug to me, unless I am missing something (which is very possible). Any help would be appreciated. I'll also attach the afphoto file, created using AP 2.3.1. Thanks. PT-rgbtoi.afphoto