# Manual

to select texture channel, add this to your shader file 

```
#pragma iChannel0 XXXX
#pragma iChannel1 XXXX
#pragma iChannel2 XXXX
#pragma iChannel3 XXXX
```

to use multipass shader, name your shader file like this:

```
shader.glsl		Main
shader.0.glsl	Common
shader.a.glsl	BufferA
shader.b.glsl	BufferB
shader.c.glsl	BufferC
shader.d.glsl	BufferD
```

Supported texture and channels:

```
rgba_noise.png
gray_noise.png
blue_noise.png
abstract1.jpg
abstract2.jpg
abstract3.jpg
bayer.png
font1.png
lichen.jpg
london.jpg
nyancat.png
organic1.jpg
organic2.jpg
organic3.jpg
organic4.jpg
pebbles.png
rock_tiles.jpg
rusty_metal.jpg
stars.jpg
wood.jpg
BufferA
BufferB
BufferC
BufferD
```

Use new_glsl.bat to create glsl file sets.
