Perspective Warp Option greyed out

I had the same problem on my mac, so i looked at the Advanced Settings under Use Graphics Processor

and had to enable Use Graphics Processor to Accelerate Computation and then Perspective Warp worked.

Restart photoshop after changing those settings.

Enabling Use Graphics Processor to Accelerate Computation didn't work for me.  I'm wondering if Perspective Warp is a feature that requires a higher spec graphics card.  I haven't seen any reference to that in any of the release info for 14.2.  (My graphics card has only 256 gb onboard ram)

Yes, i believe you need to have at least 512 mb of vram for all the advanced gpu features like perspective warp to work.

Actually 512 mb of vram has always been the minimium requirement for photoshop cc, although some of the gpu features still work with only 256.

more info:

https://helpx.adobe.com/photoshop/using/perspective-warp.html

https://helpx.adobe.com/photoshop/kb/photoshop-cs6-gpu-faq1.html

Actually, it turned out the problem I was having related to the image mode.  Evidently, Perspective Warp only works on 8-bit images and the menu option is grayed out for 16-bit images.  Once I changed the images to 8-bit, Perspective Warp works fine. 

Thanks for the input. 

As a follow-up to this discussion, I was contacted yesterday by one of the PS engineers.  He confirmed that with my system's 256 mb vram, Perspective Warp will be disabled when working on images in 16/32-bit mode and enabled for images in 8-bit mode.  Users with the recommended 512 mb of vram will be able to use Perspective Warp on 16/32-bit images.

I have an NVIDIA GeForce GT 120 card with 1GB RAM in my MacPro. I can check "Use Graphics Processor," but when I click Advanced Settings, both "Use Graphics Processor to Accelerate Computation" and "Use OpenCL" are grayed out.

Perspective Warp is grayed out even with 8-bit images.

Am I right in assuming that this card simply won't support Perspective Warp because it doesn't support OpenCL?

GT120's got blacklisted for perspective warp due to bugs in that graphics card.

Hi have a Toshiba Windows7 with Intel HD Graphics Card and under the Advanced Settings both "Use Graphics Process to Accelerate Computation" and "Use OpenCL" are greyed out.  Does this graphics card support Perspective Warp?

I was only just using it yesterday for the same image types using the exact same laptop, etc. and now today it's greyed out.
In relation to other peoples posts about the graphic processing, I'm wondering if it's because yesterday I had my laptop plugged into mains, and right now it's not (my settings change CPU usage, etc. when running only off battery).
I just tried plugging it back in, but to no avail; restarting PS while plugged in - ditto; then looked back in my preferences and found some of the graphics settings switched off - maybe it turns them off automatically when starting PS whilst unplugged?
Switched them back on, restarted PS and everything's fine again.

Someone just gave me another solution that worked. Turn the layer into a smart object. (I tried that and it didn't work.) Then turn the smart object into a smart object. That worked for me.

Yesterday, perspective warp was functioning. Today it isn't. I've tried every suggestion on this thread but nothing has worked. I'm running PS CC 2015 on a new Dell Inspiron. The OS is Windows 8.1. I've allocated 60% of vram to PS, the Graphics Processor box is checked and my graphics card is Intel HD Graphics 4400. Still nothing. Does anyone have any suggestions? Thanks.

If you have any layers LINKED, the WARP option will be grayed out. It took me a long time to figure this out, b/c you can transform layers all the other ways if linked. Hope this helps someone!

This worked a treat for me, thanks.

Photospark

None of the other solutions worked for me even with more than enough VRAM and settings checked, 8 bit image... but doing the smart object twice WORKED!!! Thank you!!! This is has to be a bug in Photoshop.

Hi, thanks for the input.  However, where do I find Advance Settings?

Preferences > Performance > Advanced

YAAAAAAAASSSSS THANK YOU SO MUCH