Fixed compatibility with Blender version 4.3

[hentila]

mat.shadow_method is removed from Blender 4.3

[hentila]

Fixes #7

[marklio]

Instead of removing this, you could create a function that will work in both environments:

def _set_hashed_shadow(mat):
    """
    Make a material cast alpha‑hashed (dithered) shadows on
    every Blender version that still supports the add‑on.
    """
    if hasattr(mat, "shadow_method"):                       # Blender 2.8 – 3.6
        mat.shadow_method = 'HASHED'
    elif hasattr(mat, "surface_render_method"):             # Blender 4.0 +
        # ‘DITHERED’ == hashed transparency in Eevee‑Next
        mat.surface_render_method = 'DITHERED'

Than call that in place of the removed line. This seems to work as far as 5.0.

[marklio]

@hentila I have a comment with a backwards-compatible replacement that seems to work (although I'm unfamiliar with common approaches for this kind of breaking change in blender add-ons. There may be a better pattern I'm unaware of.

@cessen For the record, this change gets things working (seemingly) as far as the current 5.0 alphas. I'd love to see this concrete issue fixed.