: Overlay shadow only on white - Photoshop I'm new here and think it's wonderful that there are people you can ask when you get stuck... I'm not completely new to Photoshop, but this I can't

@Barnes313

I've worked on a solution for this.

I started with an image like this:



Made a copy of a portion of the yellow wall and moved the layer on top:



Set the Blending Mode to Darken
and add a Black and White adjustment layer - and Alt or Option click the line between the Black and White layer and the one below create a clipping mask




Layers:

Black & White = Adjustment layer clipped to layer below

Layer 2 = Copy of a portion of the background - with blending mode set to Darken

Layer 1 = The white boxes that we started with

Layer 0 = Original Photo including yellow walls


Then the shadows from the background will apply to the white boxes.

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@Dunderdale640

I first want to create a gradient similar to the shadow

I make a selection to the right. Open the gradient panel (g or shift + G to get to the gradient). Double click on the gradient bar at the top.

I use the foreground to transparent option. I messed around with the values and found out that the color stop on the left could be black at 75% opacity and the color stop on the right could be #363636 at 30% opacity.



I move that layer over both white squares and duplicate the gradient shadow layer.



I then use a clipping mask on both white squares, 1 shadow layer for each white square.

Result



You can either change the opacity of the gradient or the layer itself to fine tune the brightness of the shadow.

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@Sent7350415

If you simply draw a rectangle marquee around the white boxes and right click, you will see the option to fill. In the dialog select fill with content aware and it will complete the shadow for you.

Make sure you do one box at a time.

I hope this helps.

Jigz

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