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Thread: Layer Blend Modes

  1. #1
    Join Date
    Mar 2013
    Location
    London
    Posts
    29

    Layer Blend Modes

    Some years ago when I started on the arduous road to learning PS. I took a year and around 10 dvd tutorials

    I quickly learned that Adobe's mission was to have you as a mushroom, kept in the dark and fed on TihS.
    I tried to unravel the mysteries of exactly what all the blend modes were doing to the RGB pixels cos I wasnt happy with the suck it and see approach (and I still dont like it in Digiart)

    For example two layers where the top layer multiplies on the layer below

    Yes we know that it will pick up on the darker of pixels above and below and display that - but its a crude woolly explanation and gets worse as you move down

    If one understood the simple arithmetic going on between rgb values it would be so much easier to grasp the workings. Is it too much to expect?

    Does anyone know of a good explanatory source?

    I realise my scientific approach to digiart will be a big turnoff to natural artists but it doesnt make me a bad person

    Cheers

    Robin

  2. #2
    Join Date
    May 2009
    Location
    3438 ft above sea level
    Posts
    2,951
    "I paint because I love to cut mats" (Arthur Alexander)

  3. #3
    Join Date
    Mar 2013
    Location
    London
    Posts
    29

    Clear as mud

    Thanx J

    I should have googled

    The soft light seems to have been discussed competently but the rest is largely specious, then I looked at Alpha compositing and really gave myself a headache



    There must be a better way than "suck it and see if it looks nice"

    I spent a year studying Colour Physics, fascinating to discover how most of us take our perception of colour for granted without really understanding it. A few simple experiments showed me how wrong one could be

    Till rgb colour tv arrived, we only had the painter's medium to consider (natural reflected light and subtractive colour mixing). There were few examples of additive colour mixing occurring naturally (rainbows, prisms)

    Along came the pc and MS Paint and we were able to add rgb's together and produce quite unnatural confusion with the real world

    eg consider the problem of simulating the mixing of paint colours (which themselves contain mixtures of finelly ground ochres). Paint Companies have invested millions in RnD on the topic

    Now we try and do all this by layers and blending

    Does my head in

    Someone has an epigram

    "paintings easy when you dont know how and hard when you do"

    Very true

    Robin Headache

  4. #4
    Join Date
    Apr 2007
    Location
    washington, usa
    Posts
    14,215

    blend modes


  5. #5
    Join Date
    Mar 2013
    Location
    London
    Posts
    29

    Good tip

    Thanx, I am going to follow those vidtuts up, Adobe likes to make things complicated and full of trivial bells and whistles, cos they can, cost them almost nothing and makes CS look more mystical than the bloatware it really is + CS6 = $1200!!!!!!!!!

    Then we have our magical AR4 $50, am I dreaming, am I gonna wake up and it will all vanish?

    I havent had a flush like that since Sketchup 4 came out


    Back to study

    Robin

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