How do I turn off light shadow in Blender?

There are several ways to turn off light shadows in Blender, depending on the rendering engine you're using (Cycles or Eevee) and the effect you want to achieve. Here's a breakdown of the methods:

Cycles Rendering Engine:

In Cycles, you can disable shadows on a per-light basis.

1. Select the Light Source: Click on the light object in your scene.
2. Go to the Object Data Properties: In the Properties editor, click the light bulb icon (Object Data Properties).
3. Disable Shadows: In the "Shadow" panel, uncheck the "Cast Shadow" checkbox. This will prevent the selected light from casting shadows on any objects in the scene.

Eevee Rendering Engine:

Eevee has several options for shadow control.

1. Select the Light Source: Click on the light object in your scene.
2. Go to the Object Data Properties: In the Properties editor, click the light bulb icon (Object Data Properties).
3. Disable Shadows: In the "Shadow" panel, uncheck the "Cast Shadow" checkbox. This is similar to Cycles.

Object Level Control (Cycles and Eevee):

You can also control shadow visibility on a per-object basis, influencing how an object receives shadows:

1. Select the Object: Click on the object you want to modify.
2. Go to the Object Properties: In the Properties editor, click the orange cube icon (Object Properties).
3. Visibility Panel: Find the "Visibility" panel.
4. Ray Visibility: Expand the "Ray Visibility" section.
5. Uncheck "Shadow": Unchecking the "Shadow" box here will prevent this specific object from receiving shadows cast by other objects and lights. It won't prevent the object from casting shadows itself, but it will stop shadows from appearing on it.

Important Considerations:

• Rendering Engine: Make sure you are in the correct rendering engine (Cycles or Eevee) for the chosen method. You can change the rendering engine in the Render Properties tab (camera icon).
• Global Shadow Settings (Eevee): Eevee also has shadow settings under Render Properties -> Shadows. You can adjust shadow resolution, cascade size, and other parameters here. However, for simply turning off shadows, the light-specific or object-specific controls are usually more appropriate.
• Shadow Catcher Objects: If you're using a shadow catcher object (a plane that only renders shadows, not the surface itself), disabling shadows on the lights affecting it or using the object visibility settings described above are the appropriate solutions.

In summary, to turn off shadows, the most direct method is to disable the "Cast Shadow" option within the light's Object Data Properties. For more granular control, you can adjust shadow reception on a per-object basis within the object's Visibility settings.