The images below is a test between several current leading picturestyles which give flat yet contains allot of details in the overall images. The images are all taken at the same time and only changed the picturestyle without any other setting changes. As you can see the C-Log_htp retain the most details in the sky while the other two looses it. And all 3 images are ungraded so you see the actual difference.
You can use this C-Log picturestyle on your Canon EOS DSLR 550D / T2i , 600D / t3i, 700D / t4i, 750D, 760D, 60D, 70D, 80D, 7D, 7D Markii, 6D, 5D mark ii, 5D mark iii, 1DC, 1DX, 1DX mark ii or EOS M cameras.
Yes you can download it and use it on your Canon 600d its just a picturestyle. I am totally unsure of the origins of this picturestyle as I randomly found it on my laptop and not sure who have downloaded it and placed it there. 153554b96e