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Question Spherical distortion effect in 2D

Discussion in 'Shader Graph' started by ph4ntomz, Nov 26, 2019.

  1. ph4ntomz

    ph4ntomz

    Joined:
    Jul 22, 2016
    Posts:
    37
    Hi guys,

    I'm trying to create a spherical distortion effect for 2D textures. I've tried to play around with the spherize node, but it's basically doing the opposite of what I want.

    I want to take a texture with a pattern and make it look 3D by distorting it. How could I achieve this?

    Cheers!
     

    Attached Files:

    ph4ntomz, Nov 26, 2019
    #1

  2. bgolus

    bgolus

    Joined:
    Dec 7, 2012
    Posts:
    12,238
    You probably want a stereographic projection.
    upload_2019-11-26_14-39-18.png
     
    bgolus, Nov 26, 2019
    #2
    ryanslikesocool and ph4ntomz like this.

  3. ph4ntomz

    ph4ntomz

    Joined:
    Jul 22, 2016
    Posts:
    37
    That looks awesome, I'm going to try this out! I wish I was able to understand what you did, but I'm afraid that will take a lot more learning from me before that's going to happen!

    One question I have: The calculation you do at the bottom part, is it easier/cheaper to compute than using an Ellipsis-Node? I always used the procedural generated shapes as masks.
     
    Last edited: Nov 27, 2019
    ph4ntomz, Nov 27, 2019
    #3

  4. bgolus

    bgolus

    Joined:
    Dec 7, 2012
    Posts:
    12,238
    Not really, no. It’s probably identical to the Ellipses node.
     
    bgolus, Nov 27, 2019
    #4
    ph4ntomz likes this.