To match the images, as cleverly pointed out by both images would need to undergo the same color transforms. Note how they curve at the top, and some (in the green and blue channel) don't reach 100 percent, giving the flame a "yellowish" tone.īringing the files to resolve shows the same difference. On the right of the image is the PNG, the vectorscope shows how the highlights are scaled down to a displayable values (thanks to the color transforms called "filmic"). If sampled, some of the values in this EXR exceed a value of 24 on the red channel, way over what the display can deal with. All values higher than one or 100% are ignored. Notice how values over 1 are ignored and "hard clipped". The bottom of the scale is 0 (black) and the top 1 (or 100%, meaning white).
On the vectorscope you can see how the image brightess values for each channel are represented. All values past 1 are displayed as "clipped" or "pure white".Ī graphic to illustrate. Here are the fixed files Dropbox - LUTs_Fixed.How to match an EXR (linear scene-referred information) to a PNG (in display referred values with sRGB "gamma" curves) of the same image in resolve?Įven though both images are generated from the same render layer in blender, they are going through different pipelines and the values don't match: The PNG is encoded with a gamma curve (sRGB, 2.2) and the information has been scaled to fit within the 0-1 values of display referred, while the EXR is still in Scene-Referred values that exceed what the display is capable of representing on the screen. I'm not sure if this is the intended look, but at least it's is doing something now. The adjustment is odd, though - the very brightest parts of the image go pure red. It shouldn't matter, but after I cleaned this up in Excel and saved it as a space-delimted file it appears to work. In this case the entries do not have the same number of decimal places. LUT_3D_SIZE 33 LUT_3D_INPUT_RANGE 0.0 1.0īarbi_look.cube file seems like to be a bit messed up too. After you make these changes, simply save the file and they will work with Adobe.The first number is the MIN and the second number is the MAX If it specifies something other than 0.0 to 1.0, copy those numbers using the following format, making sure to copy the numbers 3 times.This is the default range for LUTs and is not needed. If it specifies 0.0 to 1.0, Delete the whole line.Open up the LUT in a plain text editor and find the line that specifies the input range.Luckily LUT files are quite easy to edit with any plain text editor like BBEdit, and the syntax fix is trivial in this case. For whatever reason, Blackmagic decided to use an almost identical LUT format to Adobe with one tiny difference that makes them incompatible with us. Rec709 Fujifilm 3513DI D65.cube is in the wrong format to work with PPro.
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