The Clear Way To Stand Out. GRT Glass Design produces unique, high-end custom commercial and residential architectural art glass to meet our client’s visual communication needs by adapting the medium of glass to any circumstance, which includes slumped glass, fused glass, etched glass, and blown glass. The possibilities that can be explored with GRT Glass Design are limitless. GRT Glassworks with clients directly, in a consultative manner, to grasp their unique challenges and needs. Once an idea is visualized, GRT Glass will put together an expert strategy so that your inspiration can become a reality.