Glass as math, every value a slider.
SF Glass is five procedural glass materials for Blender — clear, frosted, seeded, and two tints. Not five materials, really: one node group with different numbers in it, so anything one variant does, another can be dialled into. Tint, roughness, IOR, frost amount, frost unevenness, smudge and bump are all exposed where you can reach them, not buried in a node you have to go hunting for.
Free · 758 KB · Blender 5.2+ · built for Cycles · no AI, no image textures
One node group, different numbers — the five are starting points, not the product. Shot against bars on purpose: glass only reads as glass when you can see something through it being bent.
What it does.
Every value exposed
Tint, roughness, IOR, scale, frost amount, frost unevenness, smudge and bump all sit on the group node. Most packs hand you somebody's finished decision, and if it is not the glass you wanted, tough. If Frosted is too heavy here, turn it down.
Seeded is relief, not dirt
Seeded means bubbled, uneven relief in the surface of the glass — hand-blown and cathedral glass. Smudge is a separate control, and it is flat. Two different jobs, two different sliders, named for what they actually are.
Nearly free to render
Measured against a plain material on the same Cycles shot, every variant lands between -5% and +6%. The glass itself costs almost nothing. Needing Cycles is the real cost, and no amount of simplifying a material changes that.
Procedural all the way down
No image textures, no scans, no AI, nothing that phones home. Nothing to unpack, no texture folder to keep beside the file, and no missing-file surfaces when you move the .blend. The whole pack is 758 KB.
Questions.
Why is this one free when the other material packs are paid?
It is five materials off one small node group — a smaller thing than SF Stone or SF Paint. So it is the free one. Download it, keep it, use it commercially; the only thing asked is an email address, and you can leave any time.
Does this work in EEVEE?
Render it in Cycles. That is not a preference — multiple glass surfaces cannot see each other correctly through EEVEE's raytraced refraction, and a drinking glass has four of them. The materials will load in EEVEE, but a tumbler will not read as glass. Better to know before you download it than after.
Will this work in Blender 4.2?
No. The file is saved by Blender 5.2 and will not open in any 4.x release, including 4.2 LTS. That is a Blender file-format change, not something the pack can work around. You need 5.2 or newer.
Does the tint get deeper in thicker glass?
No. Tint sits on base colour, with no volume absorption, so the colour does not deepen through a thick section the way real glass does. On a windowpane you will never notice. On a bottle or a thick-based tumbler you will. It is stated plainly here, in the README, and in the guide rather than hidden.
How much does it cost to render?
Almost nothing. Measured against a plain material on the same Cycles shot, every variant in the pack lands between -5% and +6%. The glass is nearly free — the cost of this pack is needing Cycles at all, not the shaders.
What can I actually change?
Tint, roughness, IOR, frost amount, frost unevenness, smudge, scale and bump, all exposed on the group node. The five materials are one node group with different numbers in it, so anything one variant does, another can be dialled into.
Are there image textures to download?
None. It is 100% procedural — zero image textures, verified on a clean unzip. Nothing to unpack, no texture folder to keep beside the file, and no missing-file surfaces when you move the .blend.
Get SF Glass free.
Free — leave an email and it unlocks, for good. If you want the rest of the Blender shelf, it's all one-time purchases, no subscription.
The free tools are free forever. The Starting Frame membership (14-day trial) adds Next (live run-of-show) and the saved-scripts library in Just Read It. The free tools stay free either way.