IV. Technical Comparison
Real-Time Viewport (vs UE Lumen)
Real-Time Viewport (vs UE Lumen)
| UE Lumen | D5 Engine | |
|---|---|---|
| Real-time Performance |
15.5ms (High Quality Preset)
|
10ms
|
| GI |
Noticeable artifacts beyond directional light
|
Accurate lighting from all sources with complete GI
|
| Material |
Lacks detailed GI bounce
|
Full GI bounce accurately captures material color and texture
|
| HDR |
Limited high-frequency HDR sampling; difficult to light scenes with HDR alone
|
Full HDR sampling—HDR alone can realistically light a scene
|
| Glass |
Incomplete refraction; no support for roughness; lighting cuts off
|
Complete reflection and refraction
|
| Mirror |
Poor reflection quality due to hybrid approach
|
Perfect mirror reflection with full GI and skylight support
|
Final Output (vs UE Path Tracer)
| UE Path Tracer | D5 Engine | |
|---|---|---|
| Noise Level (same 128spp) |
|
D5 shows less variance and reaches output quality faster
|
| Output Time | D5 Engine converges in seconds during real-time preview, with results nearly identical to final output—so a separate render time comparison isn't necessary. | |
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