## 4 Results
### Experiment 2: \"Museum\" Scene  
To analyze the observations in the \"Pyrite\" scene, we conducted a two-way mixed ANOVA test with ViewRadius as a between-subjects factor and RenderType as a within-subjects factor.  
As illustrated in Figure 8, this analysis validated a statistically significant main effect of RenderType on:  
* VisualRealism (question 1): \(F_{(1,15)}=4.661\), \(p.adj<0.05\). Users thus found the scene to be more visually realistic when there were rendered highlights (\(M=5.89\), \(SD=0.90\)) than when these were not rendered (\(M=5.22\), \(SD=1.40\)).
* Artifacts (question 2, higher is more comfortable): \(F_{(1,15)}=5.046\), \(p.adj<0.05\). Users were thus more disturbed by artifacts when there were rendered view-dependent highlights (\(M=2.72\), \(SD=1.23\)) than when these were not rendered (\(M=3.56\), \(SD=1.20\)).
* Presence (questions 6-8): \(F_{(1,15)}=9.023\), \(p.adj<0.01\). Users thus felt a stronger sense of presence when there were rendered view-dependent highlights (\(M=5.39\), \(SD=1.04\)) than when these were not rendered (\(M=4.76\), \(SD=1.36\)). Leading the test on each individual component showed a significant impact on the response to question 7 in particular.  
Additionally, as illustrated in Figure 9, this analysis validated a statistically significant main effect of ViewRadius on the sense of being Constrained (question 5, higher is more free): \(F(2,15)=5.242\), \(p.adj<0.05\). Leading a pairwise t-test to refine the results confirmed a significant difference both between the 20 cm and 100 cm conditions (\(p.adj<0.001\)), and between the 50 cm and 100 cm conditions (\(p.adj<0.01\)). Users thus felt more constrained in their motion when viewing the scene with a 20 cm fade radius (\(M=3.14\), \(SD=1.61\)) than with a 100 cm fade radius (\(M=5.7\), \(SD=1.16\)), and similarly a 50 cm fade radius (\(M=3.50\), \(SD=1.51\)) was found to be more constraining than a 100 cm one.  
Furthermore, as illustrated in Figure 10, our analysis validated a statistically significant interaction between RenderType and ViewRadius on perceived Sickness (question 9): \(F_{(2,15)}=4.341\), \(p.adj<0.05\). Leading a pairwise t-test to refine the results confirmed a significant difference both between the 20 cm and 100 cm conditions (\(p.adj<0.05\)), and between the 50 cm and 100 cm conditions (\(p.adj<0.05\)) when considering scenes rendered without view-dependent highlights. Specifically, in this rendering condition, users reported feeling a significantly stronger sense of sickness when they had the larger 100 cm viewing volume to explore (\(M=4.60\), \(SD=1.82\)) than in the restricted 20 cm (\(M=6.71\), \(SD=0.488\)) and 50 cm (\(M=6.50\), \(SD=0.837\)) conditions.  
Figure 8: In the “Museum” scene, the following were shown to significantly differ based on rendering type: (**a**) visual realism (higher is more realistic); (**b**) perception of artifacts (higher is less disturbing); (**c**) presence (higher is stronger).  
Finally, in terms of preference (question 10), 13 users reported preferring the replica in the condition with view-dependent highlights, and 5 users in the condition without. A \(\chi^{2}\) test did not show a significant preference for one method over the other.