Image Plane with transparent background shows some shading in Cycles, but not in EEVEE

Support Materials and Textures
2

Good afternoon, @seemon! I think it is a quick fix. Assuming the information in this post is true, you’ll want to change your Alpha type to Premultiplied rather that Straight: Alpha channel in a MOV file? - #2 by RamboBaby

Let us know how it goes!