I've tried importing a 3D KTX file into Reality Composer Pro ShaderGraph, but got nothing output. Realitykit doesn't support Image3D yet? First, I use pyktx to create a 3D KTX texture file and it seems correct in Finder preview. import numpy as np from pyktx import KtxTexture2, KtxTextureCreateInfo, KtxTextureCreateStorage, VkFormat size = 32 image = np.zeros((size, size, size, 3), dtype=np.uint8) for i in range(size): image[i, :, :, 0] = np.interp(i, [0, size], [50, 255]) image[:, i, :, 1] = np.interp(i, [0, size], [100, 255]) image[:, :, i, 2] = np.interp(i, [0, size], [150, 255]) info = KtxTextureCreateInfo( gl_internal_format=None, vk_format=VkFormat.VK_FORMAT_R8G8B8_SRGB, base_width=image.shape[2], base_height=image.shape[1], base_depth=image.shape[0], num_dimensions=3, num_levels=1, num_layers=1, num_faces=1, generate_mipmaps=False, is_array=False, ) texture = KtxTexture2.create(info, KtxTextureCreateStorage.ALLOC) for _ in range(1): texture.set_image_from_memory(0, 0, _, image[_].tobytes()) texture.write_to_named_file(f'{size}.ktx') Then I import it into ShaderGraph like this but seems nothing could be read. In addition, I tested 2D KTX file and it worked. I also tested different vk_format or KTX1/KTX2 but did not work. I also tested Image3DPixel/Image2DArray/Image3DRead and none of them work as long as it's 3D.

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