why some achievements shining or has some bright background? (Screenshot in the post for more details)

[Hira🦢🩰]

Here's a link for what I'm talking about
https://imgur.com/6OZ7Z67

[Crazy Tiger]

Rarity.

[Aachen]

The achievements which the fewest users have unlocked.

[Hira🦢🩰]

Originally posted by Crazy Tiger:

Rarity.

I unlocked achievements super rare 0.1% & it does not shining like some achievements, maybe some other reason :(

[Hira🦢🩰]

Originally posted by Aachen:

The achievements which the fewest users have unlocked.

Oh! cool
thanks a lot

[blunus]

The shining glow also disappears when users have reached it above 10%, if you don't know.

[[SK] Kaldaien]

Yeah, this is just a measure of global unlock %. I wish instead of global % the client could also count friend unlock %. Global percentages do not adequately represent people with your same skill / dedication.

[Tharon]

Trolling.

The more rare achieviements you have, the more Valve troll you by slowing down your system with that glow effect :)

(Not joking, the glow effect uses a lot of CPU / GPU).

[Crazy Tiger]

Originally posted by SK Kaldaien:

Yeah, this is just a measure of global unlock %. I wish instead of global % the client could also count friend unlock %. Global percentages do not adequately represent people with your same skill / dedication.

Friends don't necessarily adequately represent that either.

[Aachen]

Originally posted by SK Kaldaien:

.... Global percentages do not adequately represent people with your same skill / dedication.

What does that even mean?

[[SK] Kaldaien]

Originally posted by Aachen:

Originally posted by SK Kaldaien:

.... Global percentages do not adequately represent people with your same skill / dedication.

What does that even mean?

It means if 1,000 people play the game and only one gets the first achievement, 0.1% is the unlock %. If that one person is on your friend's list, 100% of people you know have unlocked it.

Both are equally valid measures, my own software computes the friend unlock % and reports that alongside global.

Here are a few sample achievement unlocks with global and friend rarity.

https://steamcommunity.com/sharedfiles/filedetails/?id=1792236690
https://steamcommunity.com/sharedfiles/filedetails/?id=1793388952

You're probably not familiar with the concept because Steam only computes global percentages. I have to probe everyone on your friends list and calculate this stuff manually.

[Aachen]

I am familiar with the concept, thanks.

Why Valve would attempt to measure something like “dedication,” though —or how you decided your friends’ achievements better-indicate such than the global statistics.

[[SK] Kaldaien]

Largely because of games like Dark Souls. Everyone makes it to the first achievement (for dying), and then sharply falls off the radar. You don't want these superfluous people given more weight than they deserve.

They do not represent the set of players that made it as far as you did, unless none of you are competitive, in which case why do you even want to know stats?

[Hira🦢🩰]

Originally posted by Tharon:

Trolling.

The more rare achieviements you have, the more Valve troll you by slowing down your system with that glow effect :)

(Not joking, the glow effect uses a lot of CPU / GPU).

but all Steam operations on my pc without playing any game between use 0.1%-0.4% average.

[Tharon]

Originally posted by HAZRD🌌:

but all Steam operations on my pc without playing any game between use 0.1%-0.4% average.

If you have GPU rendering enabled in Steam settings, your GPU is used instead of the CPU. This caused a lot of performances issues with games, until Valve decided to stop the glow effect at least when Steams hasn't the focus.
In my old spare laptop (with a Celeron dual core 2.1ghz) having two of those glow effect takes 20% of the CPU.
Of course on more efficient system the problem is mitigated by more powerful CPU and GPU, but still is a lot of power used.

Try to disable GPU rendering of web pages, then monitor you CPU usage by Steam. Remember, Steam must to have the focus.

[Lancy]

yes