Mosaic by @gfxs0da
ctrl+v paste
ctrl+z undo
the boring parts of roblox gfx work, done in a few clicks. six free tools, one tab.
countdown overlays for your game icon. make the whole countdown set in one click and save it to a folder or a .zip.
2turns your thumbnails into a grid mosaic for your portfolio or a post.
3the robux math you keep googling: marketplace tax, gamepass prices, devex and black-market rates in your own currency.
4puts your thumbnail on a roblox-style front page next to real games, so you can see how it holds up before you ship it.
5crops thumbnails and icons the way photoshop does, with the roblox sizes already set up.
6turns the .gltf you export from studio with photobooth into pngs, with a preview of each capture and empty-space trimming.
photobooth capture → export selection → .gltf
the capture comes out of the .gltf as a png
frame the character in a square icon
put the update countdown on top
see it next to real games before you publish
when i started making roblox thumbnails, everything around the actual art was manual. i'd redo every countdown icon by hand for each update, and whenever a client paid with a gamepass, i had to do the tax math myself to know how much to charge.
so i started building little tools to do it for me, with the help of ai. they saved me a lot of time, and i kept adding more as new problems showed up.
at some point i figured other artists were probably stuck doing the same things, so instead of keeping these tools to myself, i put them together here and made them public. if they save you even half the time they saved me, that's the whole point.
umbra has no backend and no accounts, so your gfx never get uploaded. they stay on your machine.
you can crop a thumbnail, send it to the frontpage mock or turn it into an update icon, and each hand-off takes one click.
built by @gfxs0da for the boring parts of roblox gfx work, so you can get back to the art.
yes. every tool is free, and there's no account, watermark or usage limit.
no. everything runs inside your browser, so your thumbnails, icons and gltf files never leave your machine. the only thing umbra loads from outside is the roblox front page data for the frontpage mock.
mostly, yes. the tools are built for desktop first, and saving straight into a folder only works in chrome, edge and opera on a computer. on a phone the files go to your downloads.
a roblox studio plugin by egomoose that captures renders of your workspace. export the capture mesh parts as a .gltf and drop it into gltf → png to get the images out.
your browser doesn't allow it. use chrome, edge or opera. in brave, turn on brave://flags/#file-system-access-api. downloads and .zip work everywhere.
@gfxs0da, a roblox gfx artist who got tired of doing the boring parts by hand.
stop wasting time.
just use umbra, bro.
pick a tool ↑countdown-overlay generator for roblox game icons · 0 loaded
roblox keeps 30% on marketplace sales. bidirectional — fill in either field.
set the gamepass price based on how much you want to receive. same logic as tax, inverted framing.
robux ↔ usd ↔ brl at the official developer exchange rate. tri-directional.
live rate: —
selling robux outside the developer exchange program violates roblox's terms of service and can result in account termination. this calculator is informational only.
at the official devex: —
see your thumbnail on a roblox-style front page · loading neighbors…
not affiliated with roblox corporation. game names and thumbnails belong to their creators.
photoshop-style crop for thumbnails & icons · no image yet
photobooth captures exported from studio as .gltf → pngs · no files yet