Hi there!

You have found my personal website.

I am Sebastian Schöner, and you are most likely here because you enjoy programming as well.

Choose your adventure:

  • GPU hang adventures

    Posted on April 8, 2025

    After the last post, you might think that I have spent most of my time lately with IL2CPP. That, however, is untrue: I have actually mostly been looking at GPU hangs. I would by no means call myself a graphics programmer: When I program for GPUs, it’s either a compute... [Read More]

  • IL2CPP, but better

    Posted on April 7, 2025

    IL2CPP is Unity’s AOT solution for C#, which takes compiled C# in the form of IL-code and turns it into C++ code, which can then be compiled using regular native toolchains. I have looked at a lot of this generated C++ code and the machine code it compiles to. There... [Read More]

  • bool4 and an unexpected new perspective

    Posted on March 31, 2025

    This blog post is 20 paragraphs exposition and 2 paragraphs punchline. It is a follow-up to my previous post on vectorization. I mentioned there that Unity’s math package implements bool4 like this: struct bool4 { [MarshalAs(U1)] public bool x; [MarshalAs(U1)] public bool y; [MarshalAs(U1)] public bool z; [MarshalAs(U1)] public bool... [Read More]

  • Nobody cares about vectorization?

    Posted on March 25, 2025

    In a recent discussion around auto-vectorization someone suggested: “What if users could tell the compiler that they expect a loop to be vectorized?” We are in luck, that experiment has already been conducted. In particular, Unity’s Burst compiler has an intrinsic for that (see Burst docs). Put Loop.ExpectVectorized(); into a... [Read More]

  • Should Unity be making games?

    Posted on March 21, 2025

    There is this general assumption that engines get better just by having the engine maker also use the engine to make games. I want to add some thoughts to that. [Read More]