Aside from language, I of course receive sensory information through a fine mesh. In fact perhaps this should have been Part I because the sensory world is more fundamental, but as a linguistic being my brain approached it through the linguistic lens first.
In the sensory plane my differentiations are again narrower and slight variation from normal or my expectation results in having to recategorise and my brain alerting me to "Error!". I think the narrowness of filter also means I can perceive sensory input as many, many pieces of data that I must process, rather than a whole or a few items. Or maybe the mesh is narrow because I perceive the input in that way?!
When perceiving through fine mesh, the simple data "I am hearing a sound and seeing a movement" may become "I am hearing another sound as well as the multitude of background noises, and the new sound is made up of differing pitches/timbres/volumes etc. I am also seeing a thousand new pictures a minute as something in my field of vision moves." My brain is trying to work out what all those pictures and sounds add up to and how that aligns with previous experiences to see whether I need to respond in any way.
It's no wonder I end up overwhelmed sometimes - even though I may not be consciously processing each item my brain is working overtime for me. A messy room becomes not just one messy room but 3264 (see "wild exaggeration" below!) items that need tidying.
It is said that autistic people tend to focus on the finer details rather than seeing the whole picture and it's hardly surprising if what we are perceiving is a whole lot of input that makes up the picture, rather than simply the picture! This goes for the metaphorical picture as well - any scenario in life such as a social situation or an event unfolding as well as a literal piece of art.
Perhaps prosopagnosia (face-blindness) is also related here. I am only very mildly affected by this, but maybe if I am perceiving many pieces of information it is harder to put them together to recognise one face. If there is a minor difference or lack of context the data don't all match so the connection is not made. And yet in compensating to over-recognise... maybe there is one feature that is similar and so in knowing that I need to make connections I assimilate the new face to one I know.
I've just realised that this chimes with something Temple Grandin speaks about in her book Thinking in Pictures that I was given for my birthday, and also Donna Williams in Somebody Somewhere. They both speak about fragmented perception and I have only just twigged that they are speaking of a similar (though in Donna Williams' case, much more extreme) idea. To literally see/hear/sense the fragments must be a very different way of being.
Another aspect of sensory input being finely sifted for me is similar to what I described in the previous post about linguistic accuracy. I may see things (or hear, smell, taste, feel etc) in a more precise or attuned way, so I might register a display at school not being straight or symmetrical more quickly than others and be more bothered by it. A speck of dirt on a dish I've washed is detected by my fine mesh and recategorised as "not clean". Perhaps that's why I love asymmetrical designs: errors don't glare in the same way, and an intentional "error" is fun because you meant it (cf. puns, wild exaggeration of numbers, language play like spoonerisms or swapping vowels, mismatched socks etc...).
I tend to eat one food per forkful because too many flavours and textures at once are overwhelming and I don't taste or feel any of them - in fact it blew my mind when I realised as a grown up that some people would put meat and vegetables on their fork together! It had just never occurred to me to do that! I can enjoy them and taste them better one at a time, so I do. In a sauce, where the flavours should blend together sometimes I can't process them all like that and one gets picked on by my brain and that is all I can taste (usually salt but sometimes a herb or other spice). I only add salt to bland foods such as chips for this reason - then I am not missing out some other flavour by tasting the salt. Ma Peggy and Peggy Toes (one of Little Peggy's Aunties) have extremely fine meshes for taste - Ma Peggy couldn't drink milk from a particular supermarket for several years because she couldn't stand the flavour and Peggy Toes can detect a change in a familiar recipe in an instant, asking what has been done differently.
I don't have perfect pitch but my pitching is closer than average. A slight error in tuning is bothersome. Some CD/mp3 players have a function where the music can be slowed down or sped up and this is used at times in dance classes to match the music to the speed required for an exercise. I could always hear when this had been left on accidentally, even if just by one notch, and often nobody noticed unless I commented (when they would usually discount my tentative comment - which was actually a desperate plea to put me out of my misery! - unless they checked, when they always found it to be so!). Even when it had been set deliberately it caused me constant discomfort to hear the distortion even if slight. My fine mesh alerted me perpetually to the slight difference from normality: "This is wrong".
These are just some examples - I could probably find them for other senses, these are just those that pop to mind first.
As with my need for precision in language, these issues if verbalised can get me labelled as obnoxious, pedantic, fussy, a pain, so again I often try to mask by not raising them. Of course that makes my comments inconsistent and perhaps thus less believable and even more inviting of the judgmental labels. And the mesh or my tolerance for variation/error does change with my stress levels which means sometimes I notice less or am able to mask more.
Well, I've wandered far from the original beginnings of my musings but it's been very interesting! Some of it is just ideas or typing as I think so it might not make much sense or I might change my mind about it in future, but I'd be interested to hear your thoughts and experiences.
Do you have fine meshes or course meshes, or a variety? Do you like your mesh style? Are there other types of meshes I've not thought of beyond linguistic and sensory?
For me, despite the extra brainspace it takes up in perceiving, understanding and interacting with the world and the anxiety caused by my mesh being different from a lot of people's, the world is tremendously beautiful through my detailed and nuanced lenses and I wouldn't want it any other way. Precision is pleasing, details are delightful and accuracy is absolutely blooming lovely.
Edited to add rambling thoughts:
Could another lens be social? What would a social fine mesh be? Narrowly defined roles, behaviour, phrases, patterns in communication. That is what autistic people try and do in order to understand non-autistic communication and "get it right". But of course there is no fine mesh and we are inevitably lacking in some way. So we wish for a fine mesh because we are fine-mesh people, but the non-autistic social world has no fine mesh.