koobas.hobune.stream
Shader Graph: how to convert gradient node into a texture
Is there a way to sample a gradient node into a texture? I want to use the Unity gradient editor to create a ramp texture for my cel shader somehow, but i can't figure out how to do it properly. Anyone has any idea? Thank you
Ah I figured it out, if you haven't cracked it yet. Are you using a custom lighting set up? If so, you can take the Diffuse output node from that (assu$$anonymous$$g there is one) and using the Colorspace Conversion node, turn it from RGB to HSV. Then, a split node. Plug the R and G channels in to a Combine node, but for the B channel plug in a Sample Gradient node (where you can edit the gradient instead of using a texture). Now use another Colorspace Conversion to chang from HSV back to RGB, multiply this with the custom lighting color. Do the same for specular.
Hope this helps!
You could render straight into a texture, but rather than doing that you could also do the same with the regular gradient editor through script;
using System.IO;
...
[SerializeField] private string m_TextureName = "Gradient";
[SerializeField] private Gradient m_Gradient = new Gradient ();
[SerializeField] private int m_Resolution = 256;
...
public void SaveGradient ()
{
Texture2D tex = new Texture2D (m_Resolution, 1);
for (int i = 0; i < m_Resolution; i++)
tex.SetPixel (i, 0, m_Gradient.Evaluate (i / (float)m_Resolution));
tex.Apply ();
byte[] data = tex.EncodeToPNG ();
File.WriteAllBytes (string.Format ("{0}/{1}.png", Application.dataPath, m_TextureName), data);
}
Something along those lines - this should save a texture called [m_TextureName].png in the assets folder.
