Question: I need a solution for creating realistic imagery without having to invest in expensive GPU hardware.

One of the top options is DeepMake. This open-source generative AI content creation system lets you generate images and videos, edit existing imagery, and automate editing tasks without any cloud computing services or pay-per-use fees. It runs on your own machine, giving you complete control over the creative process. DeepMake can generate images from text prompts, generate images from other images, mask faces and objects, and upscale images and videos. It also works with Adobe After Effects and other VFX and video editing tools, so it's a good option for creative pros.

Another top option is getimg.ai. It's a suite of AI tools for generating new imagery, editing existing imagery and training your own custom AI models. It includes an AI Generator for turning text prompts into images, an Image to Video converter, and a range of editing tools. It also offers an API for integration and access to more than 80 community-trained AI models, so it's good for a variety of tasks like realistic rendering and art creation.

If you're looking for something cheap and easy to use, Bashable could be the way to go. It's a pay-per-use system, so you only pay for the computing time you use, with no setup fees or monthly subscription payments. It can generate high-quality imagery without the hassle of buying and maintaining expensive hardware, so it's good for people who want to use AI art creation services but don't want to pay for the hardware.