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have a few old laptops and some raspberrypi's and was wondering if it would be possible to cluster them together for general tasks/3D modeling?

im not asking if this is practical. im asking if its possible.

Ayden Quinn
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OfCourse it's possible!

For example see this paper: https://link.springer.com/chapter/10.1007/978-3-030-69984-0_33

Abstract

The Raspberry Pi SBC (single-board computer) is being used for distributed memory parallel computing mainly as a low-cost teaching environment and as a low-energy consumption/green computing platform. In this chapter, we take a heterogeneous approach, where the Raspberry Pi is used along with standard computers. In the heterogeneous environment, computing as well as communication performance has to be taken into account in order to get the best results. In this chapter, we focus on the work on communication performance because it provides one of the best guidelines for successful granularity of parallel computing. We have carried out our experiments with a standard MPI (message passing interface) implementation, as well as using the currently most powerful Raspberry Pi models, in order to analyze the communication performance. We have experimented with classical Send-Receive MPI operations and the so-called one-sided MPI communication operations. Also, we document several details specifically related to the heterogeneous configuration environment that we found necessary for interoperation of MPI.

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