First and fore most, make sure to fillet all the sharp edges. Next choose the best light setup, refer images for lighting direction and other properties. Also you must have knowledge on photography, light. Watch youtube videos from the channel of Will Gibbons; Esben Oxholm; Liam Martin and much more.
Also join in keyshot discussion so that many will be helping you out on you renders and you can have reference also.
But the main thing is you must have good PC as it will improve your result a lot.
Then use your imagination to enhance the render.
I agree with most of what Ananth wrote above.
I don't believe the PC needs to be very good though. A better/faster PC will render in less time, but the end result will be the same as a slower computer.
One thing that can help learn is posting a model, then asking other members of this group to render it. You'll then see a wide range of skills and ideas be applied to the same model. If you like some of the results, ask how it was done, or that the Keyshot file be exported so you can learn from it.
I made two Keyshot tutorials, maybe you'll find something good in them:
If the PC is good, the sample will settle faster so that we can decide the light and other stuff, if your PC is way too slow sample will settle longer so that you cannot predict what's actually going so you will need to put in performance mode which doesn't give most of the details etc.,
I have experienced this since I have a typical slow PC. I agree render takes long time. Sometimes PC may even crash, for me with Keyshot 9.0 my PC has hanged when I tried to add fur.
Conclusion: PC core, GPU is very important.
Also made a tutorial, check this out:
grabcad.com/tutorials/adjust-depth-of-field-using-depth-map-photoshop
I have not used Keyshot 9 yet. But my understanding is it only works with the CPU or the GPU.
Having a fast CPU and a fast GPU is great of course. But Keyshot 9 will only use one of those for the rendering (you decide which one).
I watched a few demonstrations, and choosing between the GPU and CPU can be difficult as both have strengths and weaknesses.
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