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How to make a "circle" shadow ?

The dynamic shadow on my android device can not render correctly, it is not show, and so, I want to make a shadow like this in the picture alt text

I hope the shadow mapping to the landscape or model , and it would looks not strange. What Can I Do ? I am a newcomer ! Thanks so much ! :)

Product Version: UE 4.12 Preview
shadow qa.jpg (14.8 kB)
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asked May 15 '16 at 03:52 PM in Rendering

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3 answers: sort voted first

You can use Deferred Decal to make this ,the document is here https://docs.unrealengine.com/latest/INT/Engine/Actors/DecalActor/

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answered May 16 '16 at 06:40 AM

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avatar image typesolo May 16 '16 at 10:34 AM

I well try and learn it, thank you

avatar image Sumit Das May 16 '16 at 10:40 AM

Yes add a Deferred decal at the base contact of the character.

avatar image typesolo May 16 '16 at 05:03 PM

Oh~ No~ It seems like decals are not supported on mobile..

avatar image GodOfPen May 17 '16 at 01:10 AM

After 4.11 it support deferred decal on mobile(need to be Unlit)

avatar image typesolo May 18 '16 at 02:54 PM

I'll try it one more time :)

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If I understand you correctly, you're saying that dynamic shadows are unsupported on your device and you want to be able to simplify the shadow manually? Well if its a character as you're showing in your example image, then you cannot. Doesn't matter if you change the shape, characters (and all skeletal meshes) are dynamic - which means they move around the environment - so any shadow you give them will be a dynamic shadow. If you're wanting to add a shadow to a static object, then you could fake it with a custom decal material but why bother since your device should support static shadows. Granted, I suppose you could make a fake material shadow appear below your character but this would only work if your ground is completely flat, or if your character is hovering in the air and you can place the shadow above the ground without it looking weird from the player's view. Mostly though its not possible to do what you want without it looking really bad.

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answered May 16 '16 at 03:20 AM

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avatar image typesolo May 16 '16 at 04:39 AM

yes, I want to be able to simplify the shadow manually, I find a game:alt text

alt text

so, its shadow looks not strange,How can I do it ?

cat01.jpg (16.5 kB)
cat02.jpg (16.0 kB)
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Some Options:

  1. Unlit Decals if supported.

  2. Simple unlit material on a plane beneath character's feet. Only good for flat surfaces really (you can dynamically make it align to slopes and such). Needs animation if jumping, etc,

  3. Slightly more complicated material that samples distance behind itself to make shadow appear a bit more accurately. (still has flat ground issue)

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answered May 18 '16 at 05:51 PM

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