How to achieve fine ambient light shading effect in Three.js, which only produces subtle shadows at the junction of the model face and the face?

Implement fine ambient occlusion in Three.js: only produce subtle shadows at the edge of the model

In Three.js scene rendering, realistic shadow effects are crucial. This article discusses how to achieve fine ambient occlusion effect that only appears subtle shadows at the junction of the model face, rather than shadowing the entire face.

Users tried to use post-processing technologies such as SSAOPass, but the results were not ideal. Although AO post-processing methods such as SSAOPass, SAOPass and GTAOPass can simulate light occlusion, they usually produce shadows covering the entire surface rather than fine edge shadows shown. This is closely related to parameter settings and scene complexity.

The graphics effect is not a simple global AO, and it requires a combination of multiple technologies:

• Finely adjust SSAOPass parameters: radius , bias , intensity and other parameters directly affect the shadow range and intensity. These parameters need to be fine-tuned, reduce radius value to make the shadow more limited to the edge, reduce bias value to reduce shadow overflow, and control intensity to adjust the shadow intensity.
• Combined with other shadowing techniques: For example, using Shadow Map to process shadows from main light sources and then supplementing with subtle shadows with AO can achieve more precise results.
• Optimize model geometric details: Inadequate model geometric details will affect the shadow effect. Increase the number of model polygons or use normal maps and other technologies to enhance model details.
• Control scene complexity: The scene complexity affects the efficiency and effect of the AO algorithm. Overly complex scenarios may lead to poor AO performance or excessive calculation time.

In short, achieving the graphical effect requires fine adjustment of the SSAOPass parameters and possibly combining other shadowing techniques and model optimizations. Relying solely on SSAOPass cannot directly achieve this fine edge shadow effect.

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