A simple 3D renderer tested and developed for the TTGO T-Display ESP32 board.
The 3d renderer is: https://github.com/fededevi/pingo
The 3D renderer is pure C and has been tested on Windows mingw, cortex m3 and ofc on the esp32.
Screen driver is based on library by Loboris and espressif spi lib: https://github.com/loboris/ESP32_TFT_library