Esteban Walter Gonzalez Clua Bruno Feijó Marcelo Dreux Francisco Fonseca Software Shaders in Interactive Environments Using Relief Impostors. 284-291 2004 conf/sibgrapi/2004 SIBGRAPI https://doi.org/10.1109/SIBGRA.2004.1352972 https://doi.ieeecomputersociety.org/10.1109/SIBGRA.2004.1352972 db/conf/sibgrapi/sibgrapi2004.html#CluaFDF04