3d obj file created with Mandelbulb 3d and Fiji look like sprayed with a foam, how can this be?

[Peter Nauts]

Dearest,
I am a com[plete newbie and I wonder ; how come a 3d obj file created with Mandelbulb 3d and Fiji look like sprayed with a foam after imported into Meshlab, how can this be? I mean, in Mandelbulb 3d the fractal has f.e. straight clean corners/boxes after rendering in Mandelbulb, in FIJI it looks tight as well but after loading in Meshlab the .obj file has a bubble foam appearance. Can these be flattened? When I try this with Sculptris Sculptris gives me an error message during importing the fractal .obj file ; ' too many triangles connected to an edge (max 2) . Can I modify the .obj in Meshlab so Sculptris does import the obj file? Cos then I could try to ' flatten' the surfaces of the .obj.

Many thanks in advance for answering

kind regards