Glass material will refract like this with transparencies greater than 1. For some reason this only occurs with meshparts and unions. (The one on the left has a black sphere in it that is slightly smaller)6yr ⋅ Trackmaniadude ⋅ r/roblox
Enum.Material includes Terrain materials. Applying them to blocks gives invisible blocks that still cast shadows.7yr ⋅ Trackmaniadude ⋅ r/roblox