the most likely answer is that it’s 1 in the morning and I should go to bed 😁 or to not trust google or something

Gentlemen,
I don't know if this is the right place to ask this. But I will go ahead and explain in some detail.
I come from a VFX and CGI background and we have something called "cryptomatte", for those unfamiliar it is basically giving an ID or a unique mask to each object in a CGI render.
So a very basic example I have made looks like this :-
This is a viewport render of color IDs of a simple basic environment:
https://preview.redd.it/fe5ui8gj4c1d1.png?width=1920&format=png&auto=webp&s=453726b4449d440a37e548c2a67e32f8f5993cea
A cryptomatte of the materials looks like this(the colors are to make it easier to pick individual objects out using a color picker and create masks for them, but the underlying data contains unique string IDs and a boundary I think it is great data):
https://preview.redd.it/y8x2x2qp5c1d1.png?width=1920&format=png&auto=webp&s=dba514f60c21a6d2601f2d93aa5942b3ef4d294c
This is a single mask selected (for this one it's the trees at the background)
https://preview.redd.it/s90itaad6c1d1.png?width=1920&format=png&auto=webp&s=7e6fa54a973dca2afcc688c77afe6dc1bd697705
Multiple masks can be selected and used. The Data is stored in a file type called OpenEXR that has open standards to read the layers and Cryptomatte is also open-source.
Other supporting maps:
Depth Data (normalized):
https://preview.redd.it/2ut3cdfo7c1d1.png?width=1920&format=png&auto=webp&s=a274b79c48d892b0b1a7ed3be5cb941a23444642
Normal Data (World Space):
https://preview.redd.it/awudsm0x7c1d1.png?width=1920&format=png&auto=webp&s=e242c970b26bba49246ddef894ea184b3958fd98
So to my idea or question. Can we have diffusions limited to the mask of individual objects, just like inpainting but a multistage diffusion where it "renders" each mask.
The problems I assumed will make it bad is that inpainting is incredibly unaware of the larger context unless the prompt is clear or the denoising is set to something low so maybe an initial pass that uses controlnet using the normal and depth pass to make a first image and then have progressive iterations with the provided masks to "render" out the image. I think this would be incredibly helpful for CG Artists around the work to test out different textures and materials.
Especially for architecture where they have great data that is precise and they usually don't care that much for the background environment unless it's part of the project in which case they will have data on it - this will help them iterate quickly on different types of materials, looks and feelings, weather conditions maybe.
Maybe the tightness of the mask might be an issue when it comes to fine details like trees and grass but bluring masks and eroding them in or out might help.

https://preview.redd.it/49orqzro9c1d1.png?width=512&format=png&auto=webp&s=d19688d21dd5affb64ebe41c82feb7f50ef80936

Name	Picsart AI Photo Editor
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My world of fantastic science fiction is based on the real world, but with the addition of magic and thaumaturgy as an additional powerful branch of arts and techniques.
The historical course of my world is similar to the historical course of the real world, but there are sciences derived from magic. Runic engineering studies the interaction of glyphic circuits and geometric shapes imbued with magic with reality. Thaumaturgy and the science of aspects study the converging aspects of matter and its manipulation to obtain new materials and artifacts without classical chemical formulas. Arcanology studies the functioning and principles of so-called spells, incantations, and enchantments. Etcetera.
Science predominates overall, and while it has taken some time, it has swallowed magic, at least partially. There are still many things unknown about the functioning of magic. There are many things that work and have been obtained through trial and error, but whose intrinsic mechanisms are unknown. There are hypotheses derived from quantum physics, of course, but unconfirmed, or impossible to confirm.
But that's not the point.
In my world, just like in the real world, metallurgy has played a very important role. Without metallurgy, we wouldn't have weapons, machines, computing, electricity... we wouldn't have many things. Without metallurgy, they wouldn't have them either, and they wouldn't have thaumaturgy or many enchanted objects they employ.
Within the vast domain of thaumic metallurgy, the most prominent metals are undoubtedly the precious metals: copper, silver, and gold. Throughout the history of my world, these three metals have held an undisputed position of relevance in thaumaturgy. While iron and mercury have also been employed in thaumaturgic practice (the Thaumonomicon, one of the oldest works on thaumaturgy known, mentions thaumium and alchemical brass, two magical metals derived from iron), copper, silver, and gold have demonstrated unparalleled enchantability and magical versatility.
These precious metals have not only been used in the creation of magical objects throughout history but have also been the subject of numerous alchemical experiments in transmutation and aspectual manipulation, although most of these attempts have been largely unsuccessful and have sometimes led to unintended consequences.
In recent times, there has been a growing interest in the use of other precious metals such as platinum, rhodium, and osmium in thaumaturgy. However, this interest is still in its nascent and limited stage compared to the study and practice related to copper, silver, and gold. Thaumaturgy related to these less conventional metals is still to be fully developed, and their magical potential is far from fully understood.

The three main precious metals of interest

Copper has been a frontline choice in creating alloys that function as conductors and catalysts of magic throughout the ages, thanks to its impressive capacity to be enchanted. Furthermore, it stands out for its resistance to aspectual essences and its ability to act as an effective aspectual insulator. Even in ancient times, bronze armor decorated with primitive runes and magical glyphs not only rivaled but surpassed the resilience and tenacity of the finest steel armor of the later medieval period.
Today, this metal remains relevant in the creation of alloys such as molybdocopper, orichalcum, hepatizon, and manganin, which are used in the manufacturing of special munitions. These bullets, engraved with specific enchantments, acquire attributes and particular effects that make them highly effective in a wide variety of situations. The versatility of copper as a magical material makes it a valuable and sought-after option for practitioners of magic and thaumaturgy worldwide.
Silver, on the other hand, also stands out for its capacity to store magic. It has been employed in various ways in the realm of thaumaturgy and magic. One of its most prominent applications is its use in coating weapons and armor made of steel. Silver can be fused with this material to enhance the enchantments present in the weapons and armor, or even to directly manufacture weapons and armor imbued with its own magical properties.
Furthermore, silver has traditionally been associated with protection against supernatural entities and has been used to create a wide variety of protective amulets and talismans. Its teratocidal properties make it an essential component in the manufacturing of specialized weapons and ammunition designed for the hunting and elimination of creatures such as therianthropes, demons, and other supernatural beings. The famous silver bullets are an iconic example of this type of ammunition, known for their effectiveness in confrontations against beings of malign or magical nature. Silver, with its versatility and magical power, has earned a prominent place in the arsenal of magic practitioners and thaumaturges worldwide.
Gold, on the other hand, stands out as one of the most suitable metals for enchantment and magic absorption. Despite these qualities, its use in thaumaturgy has been limited due to its scarcity, high value, and the difficulty in stabilizing its magical properties. Creating enchanted objects from gold requires highly advanced and stabilized infusion altars, or the use of very specific alloys that can enhance its magical manipulation.
Despite these limitations, various gold alloys have sparked special interest among thaumaturges and alchemists worldwide. Below, we will detail some of these alloys, exploring their unique characteristics and potential applications in the field of magic and thaumaturgy.
Copper, silver and gold...

Tychereal gold

Tychereal gold encompasses a set of gold alloys that possess the unique property of influencing the luck of the bearer. This capability is achieved through the infusion of the "probabilitas" aspect into the alloys or through the inscription of specific enchantments. However, it is important to note that the effect on the bearer's luck is subtle.
In certain regions of Central, Southern, and Eastern Asia, red gold alloys, which contain a high copper content, are employed for this purpose because culturally, the color red is believed to bring good luck in these areas. These alloys, when enchanted or infused with "probabilitas," appear to have a greater impact on the bearer's luck, although their effect is temporary and tends to fade over time. Additionally, these alloys are prone to mild oxidation and corrosion, leading to the loss of their desired tychereal property.
However, the most effective tychereal alloy is known as "leprechaun gold," invented in Ireland during the Middle Ages. Leprechaun gold is a lime-green-toned alloy, primarily composed of gold with additions of silver and tin, along with traces of cadmium, and with high amounts of "probabilitas" aspect. Although scientific trials have shown that this alloy has a significant and generally positive impact on the bearer's luck, it presents a serious contraindication: cadmium, a heavy metal known to be toxic and carcinogenic.
Leprechaun gold, a tychereal gold alloy invented in Ireland.

Royal thaumium

Royal thaumium, a distinguished and valuable alloy, differs from common thaumium, ancient thaumium or, simply, thaumium (an amalgam of wrought iron impregnated with praecantatio). This exceptional compound is a combination of gold and aluminum impregnated with praecantatio.
By fusing gold with aluminum in an approximate mass ratio of 79:21, purple gold is obtained, a brittle intermetallic compound with an intense magenta color. When this purple gold is impregnated with large amounts of praecantatio, it becomes royal thaumium.
The term "royal" in its name is attributed to its high production cost and its original association with royalty and divinity. Although it shares similarities in appearance and qualities with thaumium based on iron, the properties of royal thaumium are even more pronounced. It can store approximately 53 times more magic than iron-based thaumium, acts as an extremely impermeable aspectual insulator to essences, and possesses a tremendous enchanting capacity. However, it is important to note that royal thaumium is extremely fragile compared to its iron-based counterpart.
Royal thaumium was initially discovered and crafted by alchemists in the late 18th century when the first samples of aluminum were successfully extracted, which at that time were considerably more expensive than gold due to the difficulty of obtaining it. During the early to mid-19th century, this alloy was widely used in the manufacturing of cores for high-power magic wands. Although it has been replaced by more economical thaumic materials today, royal thaumium is still appreciated in certain classic magic circles, acquired by purists and collectors of magical objects.
Royal thaumium, derived from purple gold, an intermetallic compound.

Aurallium

Within the realm of modern metallurgy, quasicrystals have emerged as structural forms that, unlike conventional crystals, are ordered but not periodic. Most quasicrystals discovered to date are metallic and exhibit symmetries that defy traditional crystalline conventions, such as decagonal and icosahedral shapes.
These quasicrystals are particularly intriguing in the field of thaumaturgy due to their ability to harbor large densities of a degenerate form of the "ordor" aspect, known as "auratio."
Among the most relevant quasicrystals in thaumaturgy are dodecaedrites, quasicrystalline alloys generally composed of aluminum or rare earth metals, infused with huge amounts of praecantatio. These dodecaedrites have the capacity to store massive amounts of magic, surpassing conventional thaumic alloys by thousands of times, making them ideal for the manufacturing of high-powered magical objects and disruptive antimagic munitions.
The term "aurallium" refers to a group of dodecaedrite-based alloys of gold quasicrystals, such as the gold-gallium-terbium alloy AC and other alloys M,X)85.7RE14.3 (M = Ag, Au, X = Al, Ga, In, RE = Er, Lu). However, the most notable of these alloys is "pure aurallium," composed of pure gold impregnated with large amounts of "auratio" aspect essence. This material forms dodecahedral, icosahedral, and tricontahedral crystals of a pale orangish-golden hue with celestial blue highlights.
Pure aurallium is metastable, meaning its quasicrystalline structure can collapse under certain extreme conditions to form amorphous gold, releasing energy and magic in the process. Additionally, this alloy has the ability to induce ordering and crystallization of surrounding materials when magic is applied to it, which could be utilized for various purposes, such as manufacturing enhaced wand cores for specific spells, or negentropic weapons like the "ordor ray."
Aurallium icosahedral quasicrystal.
Nuclear tests conducted by North Korea using this material, whose documentation has been obtained and released by the espionage forces of Acheron (an organization tasked with containing and eliminating supernatural threats), yield terrifying results. Atomic weapons doped with big amounts of aurallium generates negentropic fields that destroy all organic tissue within a radius several times larger than the blast radius and the lethal neutron radius. Animal and plant tissues liquefy and reorganize into perfectly ordered crystals of amino acids, phosphates, and carbohydrates imbued with high-purity aspect essences that may continue reacting dangerously with the environment, potentially producing flux, taint seeds and void gaps. All exposed rock and metal recrystallize into large amalgams of pure single crystals of various pure materials, forming ordered giant minimalist structures. And exposed water is aetheralized into pure aqua aspect that permeates and destructively alters any exposed material.
Surprisingly, despite the high thaumaturgy and technology involved in the production of pure aurallium and aurallium alloys, traces of aurallium have been found in well-preserved ancient legendary artifacts of high power, although the origin of such traces of aurallium is likely accidental or non-conciouss, this explains some of the astonishing qualities of these arcane artifacts.