Photo Compositing: Combining Images Convincingly
A student project from the Nexapulse digital photo editing program.
About this project
Compositing is where technical skill and visual judgment meet. Cutting out a subject and placing it on a new background is simple; making it look like they belong together takes a different level of attention.
Masking and edge work
Students begin with subject extraction using Select and Mask in Photoshop. Hair and semi-transparent edges are the main challenge. The Refine Edge brush, combined with decontaminate colors, handles most cases, but students also practice manual channel-based masking for difficult situations.
Every composite in this project requires at least two light sources to be identified and matched. Students paint in shadows and edge lighting using soft-light layers with sampled colors from the background plate.
Color matching between elements
A composite fails most visibly when color temperature differs between elements. Students use Match Color and manually corrected Curves layers to align the overall tone of subjects with their backgrounds. Color grading is applied last, after all elements are unified.
- Select and Mask with Refine Edge brush
- Channel-based masking for complex edges
- Shadow and rim light painting on blend mode layers
- Match Color and manual Curves alignment
- Unified color grade across all composite layers
Program breakdown
Project stages
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Subject extraction
Three extraction exercises with increasing difficulty: simple background, complex hair, glass or transparent material.
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Light source analysis
Students annotate provided background images identifying light direction, color temperature, and shadow angle before compositing.
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Shadow and rim light construction
Adding cast shadows and edge lighting to seated subjects using reference images from the same lighting setup.
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Color temperature unification
Applying corrections to match subject and background under identical apparent lighting conditions.
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Final composite submission
A complete composite with a flattened version and a layered source file submitted for instructor review.
Interested in the full program?
See what the complete learning path looks like — from raw file handling through advanced compositing and portfolio review.