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There are some minor drawbacks with this approach to full dome projection, but are quite minor when compared to the benefits of the total system.
| Differing Pixel Sizes | Since the projector's square pixels are reflected at different angles off the spherical mirror surface, the shapes and sizes of pixels in different parts of the dome are marginally different. |
| Mirror Fragility | The spherical mirror used in the MirrorDome is a first surface mirror and hence it is more fragile than a conventional second surface mirror. Extra care needs to be taken when handling the mirror to avoid damaging the surface. In many ways it is similar to a projector lens, the only different being that the mirror is larger. |
| Full Dome Coverage | Whilst it’s possible to achieve full dome coverage with the MirrorDome system, the optimal setup is to use a slightly truncated alignment where there are small regions of non projection in the rear of the dome. These regions are significantly smaller than a traditional truncated fisheye system, and if your audience is seated undirectionally, then these regions are not seen at all. |
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