> Yes, but specific implementation aren't. You can make a new implementations of TBDR renderers without paying anyone. > I was replying specifically about IP.

> Yes, but specific implementation aren't. You can make a new implementations of TBDR renderers without paying anyone. > I was replying specifically about IP. And the context of Apple not using IMG's IP. Which was "never" the case. As pointed out by IMG’s CEO in 2019 before the 2020 IP renewal. The point is that the patents (ie. the IP that would matter in this case) have expired for TBDR, despite your claim "We are argue whether Apple needs to pay for Tile based deferred rendering ( You can search the term mentioned on Apple's Dev Reference document ) to IMG, since relevant IP could be obtained with ARM. ( Arguably with cross patent argument with IMG, but anyway let's ignore that )." No cross patent agreements are necessary.