Imports github.com/DexterLB/traytor/jsonutil github.com/DexterLB/traytor/hdrimage github.com/DexterLB/traytor/maths github.com/DexterLB/traytor/ray github.com/DexterLB/traytor/hdrcolour Standard library imports image/png image image/jpeg bytes encoding/json fmt math strings