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Chell's arms appear black at some shader levels #255
I recently played through Portal 2 (single player) for the first time. For the most part, I was blown away at how well it worked (once I had gotten it to run). Good job! However, I did notice a graphics glitch near the very end: In most scenes where you see Chell's arms, they appear to be black and featureless, rather than pink.
This only happens on the "High" and "Very High" shader detail levels. If I turn it down to "Medium" or "Low", it looks fine to me. Se the attached screenshots, which are made at "Very High" and "Medium" levels respectively.
(This is reminiscent of issue #150, but that is listed a being fixed already. This glitch is much more noticeable in Portal Stories: Mel, since there you always see the hands while carrying the portal gun.)
As you can see from the information below, I'm using the open-source graphics drivers. While they've improved a lot in recent years, I wouldn't really be surprised if this turns out to be a driver bug rather than a Portal 2 bug.
Operating System Version:
Recent Failure Reports:
Hi, good idea. I just opened a bug for it, as I couldn't find a report. Hope I did alright, it's my first report.
If there's anything more to add, please feel free to comment on the ticket
For reference, the Mesa bug has been tagged as RESOLVED NOTOURBUG, stating that it
"... uses a shadow sampling instruction on sampler 15, but the texture bound to texture 15 is a 1x1 GL_SRGB texture ... that is, the game is invoking undefined behaviour, hence this is not our bug."
I agree. With the info from the Mesa bug ticket, I think the code-flaw on Valve's side is a fair assumption. Sadly, there doesn't really seem to be activity from Valve on this so far.