int vox_init(int xsz, int ysz, uint8_t *himg, uint8_t *cimg);
void vox_destroy(void);
void vox_framebuf(int xres, int yres, void *fb, int horizon);
/* negative height for auto at -h above terrain */
int vox_init(int xsz, int ysz, uint8_t *himg, uint8_t *cimg);
void vox_destroy(void);
void vox_framebuf(int xres, int yres, void *fb, int horizon);
/* negative height for auto at -h above terrain */