Realistic Curtain Design Visualization: How to Use Blend Modes

By Svetlana, textile decorator with 19 years of experience and founder of an online school teaching Procreate visualization for curtain and textile professionals on iPad and iPhone.

How I use blend modes to make curtains look real

(not like flat drawings)


I’ll be honest - when I started doing curtain visualizations in Procreate, everything looked… flat. Like a coloring book. Clients would nod politely but you could see they weren’t impressed.
Then I figured out blend modes. Now my renderings look like photographs, and clients stop scrolling to ask “wait, is that real or did you draw that?”
Here’s what actually works (and what’s a waste of time).

Multiply - for when your curtains look like cardboard

This is the one I use most. It adds shadows.
Without shadows, your curtains have no depth. They look like they’re floating. With shadows, suddenly there are folds and pleats and dimension

Here’s what I do:
∙ New layer above the curtain
∙ Set it to Multiply
∙ Grab a soft brush, turn opacity down to about 30%
∙ Paint gray (not black - that looks harsh) where shadows should be
Where do shadows go? Anywhere fabric overlaps. Under pleats. Behind folds. Where the curtain meets the wall.
Takes maybe five minutes. Makes a huge difference.
One thing I learned the hard way - don’t use pure black. Use a dark version of your fabric color. Dark blue for blue curtains, dark burgundy for red ones. Looks way more natural.

After 19 years in textile decoration, I’ve learned one thing very clearly: Clients don’t resist buying curtains They resist buying something they cannot see


Screen - making light actually look like light

This one confused me at first because it seemed to just wash everything out. But once you get it, it’s perfect for sunlight.
Screen mode lightens whatever’s underneath it. So when you paint with a light color on a Screen layer, it looks like actual light hitting the fabric.
I use it for:
∙ Sunlight coming through a window
∙ The edges of folds that catch light
∙ That rim light effect you see in expensive photos
My process:
∙ Layer above the curtain, set to Screen
∙ Use a warm off-white or pale yellow
∙ Paint where light would hit
∙ Usually I keep it subtle, around 25-30% opacity
The mistake I made early on was painting the whole curtain. Don’t do that. Light hits specific spots - edges, tops of folds, areas near windows. Be selective

Overlay - the fast way to show different fabrics


This one’s a lifesaver when clients want to see how different patterns look.
Let’s say you drew curtains and the client asks “can I see it in that damask fabric?” Instead of redrawing everything, you just drop the fabric pattern on an Overlay layer.
The pattern shows up but all your shading and folds stay intact. It’s like magic except it’s just math.
I keep a folder of fabric photos and patterns. When someone wants to see options, I swap overlay layers. Five different fabric options in two minutes. Client thinks I’m incredibly fast.
The trick: Lower the opacity to around 40-50%. Full strength usually looks too intense.

Darken - for line art over color

Honestly, I don’t use this one as much, but it’s handy for one specific thing.
If you have black and white sketches or line art (like decorative trim, tassels, details), Darken mode makes the white disappear and keeps the black lines.
Instead of spending forever erasing white backgrounds, just set the layer to Darken. Done.

Add - use sparingly or it looks radioactive


Add mode makes things glow. And I mean GLOW.
It’s great for sunset through sheer curtains or dramatic backlighting, but you have to be careful. Full strength looks ridiculous - like someone installed neon lights in the curtains.
I use it at maybe 10-15% opacity, max. Just enough to add warmth and atmosphere.
Works really well for golden hour shots. Orange-pink glow through white sheers, that sort of thing. Those renders always get the most likes on Instagram, if you care about that.

Multiply for shadows on walls and furniture


This deserves its own section because it’s what makes curtains look like they actually exist in a room.
Real curtains cast shadows. On the wall behind them. On the floor. On nearby furniture. Without those shadows, your beautiful curtain drawing looks pasted on.
I create a layer UNDER the curtain (or on the background elements), set it to Multiply, and paint soft shadows where they’d fall.
Soft brush. Low opacity - like 20%. Gray color. Paint where the curtain blocks light.
This single step makes everything look 10x more real. Clients stop questioning whether your visualization is accurate.

What actually matters


Look, you could learn 20 blend modes. I’m telling you I use basically three: Multiply, Screen, and Overlay.
Multiply for shadows (use it a lot).
Screen for highlights (use it less, be subtle).
Overlay when you need to show pattern options (huge time saver).
The rest are nice to know but not essential.

The real workflow:
1. Draw the curtain shape
2. Multiply layer - add shadows
3. Screen layer - add light
4. Done
That’s 80% of what makes something look professional.
The fancy stuff - multiple shadow layers, rim lighting, atmospheric effects - that’s extra. Start with the basics.

Common mistakes I made (so you don’t have to)


✔️ Using 100% opacity on blend modes. Don’t. Start at 20-30% and build up.
✔️ Using pure black for shadows. Looks harsh. Use dark versions of your actual colors.
✔️ Painting light everywhere. Light hits specific places. Be intentional.
✔️ Forgetting to name layers. When you have 15 layers all called “Layer 12”, you’ll hate yourself.

Why this actually matters


Before I figured out blend modes, clients would say “that’s nice” and then ghost me.
After? They approve designs faster. They trust the visualization. They’re willing to pay more because the work looks professional.

The curtain brushes and PNG templates I sell work great on their own. But combine them with proper use of blend modes and you get results that look like you hired a 3D artist.

That’s the difference between “she does nice drawings” and “she’s a professional visualization artist.”

PNG templates for Textile projects for interior design

0 comments

Leave a comment