Vj

Grab from

• https://www.shadertoy.com/view/lsfcD7

• https://www.shadertoy.com/view/4dcGW2 @image en fragColor = rd; to remove ugly lighting

• custom images in shadertoy:

/*

A simple method to load custom image textures in Shadertoy!
-----------------------------------------------------------

The idea is to call directly the SetTexture function found in Shadertoy js code.

Here is how to loads the three textures needed for this shader:
 - Open the javascript console of your browser:
				   Mac      /     Windows
	Chrome:  cmd + opt + J  /  ctrl + shift J
	Firefox: cmd + opt + K  /  ctrl + shift K
    IE:          na         /  F12   

- Then copy the following lines in the console to load custom 2048x2048 textures:

gShaderToy.SetTexture(0, {mSrc:'https://dl.dropboxusercontent.com/s/88u2uo8dxdmgzxo/world2.jpg?dl=0', mType:'texture', mID:1, mSampler:{ filter: 'mipmap', wrap: 'repeat', vflip:'true', srgb:'false', internal:'byte' }});
gShaderToy.SetTexture(1, {mSrc:'https://dl.dropboxusercontent.com/s/5rdhhnvnr5mochq/cloud2.jpg?dl=0', mType:'texture', mID:1, mSampler:{ filter: 'mipmap', wrap: 'repeat', vflip:'true', srgb:'false', internal:'byte' }});
gShaderToy.SetTexture(2, {mSrc:'https://dl.dropboxusercontent.com/s/ojl5zoxgbdn5w5s/light2.jpg?dl=0', mType:'texture', mID:1, mSampler:{ filter: 'mipmap', wrap: 'repeat', vflip:'true', srgb:'false', internal:'byte' }});

- Or, the following lines for 1024x1024 textures:

gShaderToy.SetTexture(0, {mSrc:'https://dl.dropboxusercontent.com/s/0j4q7p4x0upj40q/world1.jpg?dl=0', mType:'texture', mID:1, mSampler:{ filter: 'mipmap', wrap: 'repeat', vflip:'true', srgb:'false', internal:'byte' }});
gShaderToy.SetTexture(1, {mSrc:'https://dl.dropboxusercontent.com/s/26xr0l2ly68xgzh/cloud1.jpg?dl=0', mType:'texture', mID:1, mSampler:{ filter: 'mipmap', wrap: 'repeat', vflip:'true', srgb:'false', internal:'byte' }});
gShaderToy.SetTexture(2, {mSrc:'https://dl.dropboxusercontent.com/s/b67udjdsw4gzf99/light1.jpg?dl=0', mType:'texture', mID:1, mSampler:{ filter: 'mipmap', wrap: 'repeat', vflip:'true', srgb:'false', internal:'byte' }});

- hit return to execute and load the textures.


Using your own images:
 - The first argument of gShaderToy.SetTexture() is the iChannel index from 0 to 3
 - The second argument defines the url and additional parameters of the texture.
 - Your images must be hosted on a server (such as Dropbox) that allows direct link 
   from a different domain in javascript. Otherwise, you will get an error message:
   "'example.com has been blocked from loading by Cross-Origin Resource Sharing policy"

*/