Ghost End Portal in The End / Missing layer with AMD/ATI graphics cards

Thank you 🙂.

This seems to be a rendering bug; it looks like several layers of the end portal texture (it's multi-layer) are rendering in the wrong location: your actual portal is clearly missing these layers.

It may help Mojang if you provide some graphics card information (I'm not sure; I've seen Dinnerbone ask players for their snooper info before - that may help if you're willing to post it). All I know is I've never seen this bug myself, so it may be graphics-related.

It’s most likely the remnants of a glittering effect that was originally set to spawn around the exit portal, due to the fact that it spawns at the same level of elevation as the portal in the exact same pattern. The reason it moves around is , as Gerrard said, a rendering bug. I’ve seen this come from every exit portal since it first was added.

It seems like this only effects ATI cards,

The "ghost" is the extra layers that are missing from the portal, they are attached to the player thus move around as the player moves.

http://www.minecraftforum.net/topic/1665818-odd-render-bug-with-ati-graphics/

Can anyony confirm that this bug occurs only with ATI graphics cards and with the latest drivers Catalyst 13.1 ?
(I have a Radon 6700 and do not have this effect)

I've seen it on my desktop, which uses Nvidia graphics, and I see it on my laptop which has AMD Radeon, so no, not ATI Exclusive.

Between testing every PC I have access to and the many people I talked to this seemed to be exclusive to ATI.
You two seem to be exceptions,

@Kumasasa you would be the first ATI user I've talked to that doesn't have this issue. Since the "ghost" isn't visible, is the portal itself rendering correctly? (picture in the forum link I posted) Still happens on Catalyst 13.1 also.

@Brian your the first nvidia, that I know of, I wonder if its your driver/settings. (A while back AMD bought ATI, though the ATI name was dropped a few years ago, many still use it)

@Timothy Tomkins: You're right.
I've never seen the portals with NVidia graphics until now, so I didn't realize, that there is a layer missing, see my screenshots.

But I didn't see the ghost portal.

OpenGL: AMD Radeon HD 6700 Series GL version 4.2.12002 Compatibility Profile Context 9.12.0.0, ATI Technologies Inc.

Now I see the new photos I never noticed that it really was a layer that lacked

Same goes for me. I never even knew that layer was there.

Finally seeing the ghost portal.

Confirmed.

Confirmed that happens only at amd/ati graphics cards, I've a nVidia one and my brother an amd one, he can see the ghost portal but I can't

Its the ATI graphics cards offseting the sub layers of the portal. If you use an nVidia card and look at the portal in comparison to the texture file, you can see that Minecraft takes the Endportal texture and duplicates it down about 4 or five times onto different layers, scaling it down and rotating it about 15-45deg each layer, all the layers move very minutely making the endportal look like the stars are moving. This can be seen if you replace your endportal texture with say my attached file, end_portal.png (place in a resourse pack in <resoursepack name>/assests/minecraft/textures/entity).

The AMD/ATI cards appear to not know how to interperet the sub layers that same way that the nVida cards do (I'm guessing Mojang uses nVida cards, or equivalent, in there machines). It may be something simple in the engine for Mojang to tweek to fix (or a setting in the AMD/ATI cards needs to be turned off, kind of like the anti-aliasing issue/bug) for this to be fixed.

Confirmed for 1.7.1 on my laptop which uses an AMD card.

I found a fix for it, hopefully some Mojangsta sees it and fixes it in game. The textures/entity/end_portal.png texture is binded only once, when the first layer on the bottom is generated. On ATI/AMD cards, each render overwrites the previous one, if the texture isn't rebinded, thus only the last layer (the topmost blue layer) is visible.

By having the texture rebinded every single time, it renders correctly - here's a screenshot of the decompiled code: http://i.imgur.com/mizF9Fx.png

Thanks, Daniel! The fix looks good and I've applied it to our codebase, it'll be in the next snapshot.

Incidentally, this is the second job I've had now where a bug has been caused by AMD playing fast-and-loose with graphics APIs, though it was DirectX at my previous job and OpenGL here. Good to know they handle either stack equally badly.

Its back in 14w27 (MC-60499).

Can confirm it's back.. let me get screenshot

2014-07-08_13.49.57.png - In 14w27b, the white thing in the very far distance is the ghost portal. In the previous versions that had MC-1607, it would appear 30 blocks next to the player instead of about 500.

confirmed for 14w28b

confirmed for 14w29b

Confirmed for

• 14w31a

confirmed for 14w32a and 14w32b