Earlier quoted context omitted.
>And it wouldn't even interfere with their competitive edge, since the software isn't their business. They don't have to care about the GPL as long as the software does what they want. Most developers know this, but company managers that forbid open source contribution don't understand this. That's why I'm personally not too much against source available licensing. It's the only language old companies understand.
Speculation on my part, but I think one of the reasons the big graphics companies have their own software (think Pixar) at least in part is because it gives their results a unique visual look that becomes part of the brand. Why anyone would use all third-party proprietary software, I have no idea.
Here's where that procedural texture approach started: "Road to Point Reyes".[1] First "photorealistic" render, 1983. Today, that's not even an acceptable game asset.