Question: I need a solution that can speed up the rendering process for architectural designs without breaking the bank.

For speeding up rendering for architectural designs without a huge budget, Archsynth is a top pick. This AI tool converts hand-drawn sketches into finished digital images almost instantly. It also comes with features like fast rendering, style control and a range of AI assistants. Pricing ranges from $11.99/month to $199/month, so it's a relatively affordable option for boosting productivity and image quality.

Another top contender is Architect AI, which creates photorealistic renderings from conceptual sketches in a matter of seconds. The service lets you upload sketches, photos or 3D model screenshots and then tweak parameters to get a range of styles. It has a pay-as-you-go pricing scheme, with credits starting at $1.99 for 10 credits, so it's good for whatever rendering needs you have.

LookX AI Cloud is another all-purpose option for architects and designers. It can turn text, sketches and prompts into photorealistic renderings and videos, and it's got features like RealTime Rendering and Video Generation. With a range of tools to speed up the design process, LookX AI Cloud is good for fast collaboration and iteration.

Last, mnml.ai is a suite of AI tools to create high-quality renders and variations. It includes tools to turn freehand sketches into photorealistic images, to create exterior and interior design variations and to generate professional concept statements. With integrations with common 3D modeling tools and tiered pricing, mnml.ai is adaptable to different user needs.