Using this tool you can combine or merge two 3D LUTs.
Combine creates a new LUT that has the same effect as if you had applied the first LUT and then the second LUT to your image. Average creates a new LUT by averaging the two LUTs. You can specify the weight of LUT 1 for averaging. Luma-Chroma is similar to Average, but uses a different model, which allows you to manage luminance and color information separately. The size of the resulting LUT is the size of the larger LUT.