RSDuck

// When it's this way it flickers with 3D disabled
BufInfo_Init(bufInfo);
for (int i = 0; i < CHUNK_HEIGHT / CHUNK_CLUSTER_HEIGHT; i++)
if (c->data[i].vbo) BufInfo_Add(bufInfo, c->data[0].vbo, sizeof(world_vertex), 3, 0x210);

if (bufInfo->bufCount) C3D_DrawArrays(GPU_TRIANGLES, 0, c->vertexCount);

// But this way the flickering is gone
BufInfo_Init(bufInfo);
for (int i = 0; i < CHUNK_HEIGHT / CHUNK_CLUSTER_HEIGHT; i++) {

RSDuck

#include <stdio.h>
#include <string.h>

#include <citro3d.h>

#include "render.h"

#include "world.h"
#include "player.h"