Portfolio Shop About Services Contact

Your Bag

Your bag is empty.

⚠ Portfolio in Progress, More Work Coming Soon

Available for commissions

NADIR
AXIOM
by Daniel Portero

Human-made, as it was always meant to be.

View Portfolio Shop Now
No. 01
Graphic Design
Illustration
Fine Art
Scroll
Graphic Design✦ Illustration✦ Fine Art✦ Merch & Apparel✦ Brand Identity✦ Original Paintings✦ Limited Editions✦ Commissions Open✦ Graphic Design✦ Illustration✦ Fine Art✦ Merch & Apparel✦ Brand Identity✦ Original Paintings✦ Limited Editions✦ Commissions Open✦

Selected Work

PORTFOLIO

A selection of works in painting, illustration, and design.

↓ Click on each card to see more. These are just covers, each section has more work inside.

AXIOM BRANDS COLOR PALETTE TYPOGRAPHY Aa Bb Cc The quick brown fox jumps over the lazy dog. ABCDEFGHIJKLMNOPQRSTUVWXYZ BRAND IDENTITY / 2026

Brand Identity

Axiom Brands

Nature Series

Illustration

Nature Series

LUCID A VISUAL ESSAY

Poster Design

Lucid, Poster Series

Acrylic on canvas, Between Two Worlds

Painting

Between Two Worlds

Character & World Building

Illustration

Character & World Building

FIG. 01 "Form follows feeling." MERIDIAN QUARTERLY p. 42

Editorial Design

Meridian Quarterly

Verdant Fields, Acrylic on canvas

Painting

Verdant Fields

Original Works & Merch

SHOP

Original paintings, prints, and graphic pieces, all made by hand.

Custom Orders

Coming Soon

Merch and apparel is in the works. Tees, hoodies, tote bags. All designed by hand, all worth the wait. Drop me a message if you want to be notified when it launches.

Get Notified

Coming Soon

Original paintings will be listed here as they become available. Acrylic, oil, mixed media. If you are interested in a specific piece from the portfolio, send me a message and we can talk.

Enquire About a Piece

Coming Soon

Prints and posters of selected illustrations and designs are on the way. High quality, limited runs. Get in touch if there is a specific piece you would like to see as a print.

Request a Print
Original
Oil on canvas, 80×100cm

Between Two Worlds

Oil on Canvas

80 × 100 cm · One of a kind

€1,200
Acrylic on canvas, 60×80cm

Verdant Fields

Acrylic on Canvas

60 × 80 cm · One of a kind

€980
New
Mixed media, 50×70cm

Amber Study No. 4

Mixed Media

50 × 70 cm · One of a kind

€650
Ed. 25
Giclée · 50×70cm

Aurora No. 1, Giclée Print

Edition of 25 · Signed & Numbered

€55
FOR MA FORMA NADIR AXIOM / 2025 Art print · A2

Forma Studio Poster

A2 · 170gsm Matte

€35
Ed. 50
Risograph · 42×59cm

Drift, Risograph Print

Edition of 50 · Signed

€45
Screen print · 30×40cm

Shadow Study, Screen Print

Open edition · Signed

€40
Daniel Portero

The Artist

ABOUT

"Art the way it was always supposed to be. By one person, for another."

Hello world. My name is Daniel, the lead creative mind of Nadir Axiom. My main interests are digital illustration and graphic design, though I also love painting in traditional mediums such as acrylic and oils.

Based in Madrid, my workflow is very client oriented, shipping and collaborating worldwide. Whether it's a commissioned painting or a complete visual identity, everything is human-made, as it was always meant to be. :]

I think you can also tell what my favourite colour is… 🤔

Previously known as Katarsis Workshop. If you have come across signed work with that name, it is the same artist. The name changed, the work did not.

Work Together
2+ Years Active
∞ Ideas Left
🌍 Ships Worldwide
19+ Paintings Sold

What I Offer

SERVICES

Available for commissions, collaborations, and client work, worldwide.

01

Graphic Design

Full visual identities, brand systems, layouts and more. From the first concept all the way to files ready for production.

02

Digital Illustration

Characters, concepts, editorial work. Everything drawn by hand digitally and delivered high resolution, ready for print or screen.

03

Custom Commissions

Have something specific in mind? Get in touch and we'll figure it out together. Paintings, illustrations, whatever you need made.

04

Acrylic Painting

Original works on canvas, expressive and textured. Available as commissions or ready to ship if there's a piece you already have your eye on.

05

Oil Painting

Rich, deep and made to last. Oil on canvas for collectors, interiors or anyone who wants something that actually means something on their wall.

06

Ships Worldwide

Wherever you are, physical work can reach you. Everything is carefully packed and shipped internationally with care.

The Process

PROOF OF WORK

Not AI. Never was. Here's the mess that proves it.

WIP shots · Sketches · Studio · In progress

Drop photos here

or click to upload · jpg, png, webp

No photos yet. Upload some WIP shots above.

Let's Talk

GET IN
TOUCH

Open for commissions and collaborations, write to me and let's talk.

Your Enquiry

0 items selected

Your enquiry list is empty.
Browse the shop and add pieces you're interested in.

Portfolio › ›

Year
Medium
AvailabilityEnquire for details
Get in Touch