Method for generating structured images without using diffusion models？

The computational complexity of the diffusion model is very high, which means it may not be applicable in many practical scenarios.

If our target image is two-dimensional but essentially a combination of points and lines, with either a single color or a limited number of colors, are there any other frameworks to achieve the conversion between text and image, besides stable diffusion?

I can think of the following: 1. Combinatorial optimization methods for generating interior design plans. 2. Methods based on simple neural networks for matching text and images in plane geometry math problem

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