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Hi everyone, I have been looking to optimize my water reflections, I have seen this thread and done the suggested steps. https://developer.unigine.com/forum/topic/1136-solved-how-to-improve-the-performance-of-multiple-objectwatermesh-in-one-scene/?hl=%2Bwater+%2Breflections#entry5779 I now want to add another LOD to my trees which is VERY low poly and only visible in the water's reflection, Not the viewport, to stop using high poly trees in reflections at all. I know I will need to use the reflection mapping to do this but I'm having problems. I can get it to not reflect, but I cannot get it to only reflect. When I set the parameters to not see the object in the viewport and still see the reflections I get nothing in the water, nothing reflects. As soon as I set the reflection map different to the viewport map in the camera tools, I lose all of them. Then in continuing to follow the guidelines, never get them back. I have been following these guidelines: https://developer.unigine.com/en/docs/1.0/principles/objects/#reflections Any help would be greatly appreciated. Nathan

Hi, Latest SDK Direct3D11 renderer Execute BodyWater demo Rotate de camera Looks like there is an strange reflection as the attached image shows. Best regards, Iván.

Hi All ! We've just noticed a strange behavior using the 'mesh_reflection_cube_base' material: the reflected parts are always full-bright and are not affected by the light. Well to be precise, the reflected parts are sensitive to the specular but they are not darkened when no light hit the surface. Here is a screenshot showing the issue: As you can see, there is one face of the building receiving some light (on the right) and the other one receiving no light (on the left) and therefore should be completely dark. In order to have reflection activated only on windows, we are using a reflection mask texture which is actually put into the specular texture slot (yeah, the shader works like that) which may be part of the problem actually. Another screenshot, this one has been taken with all lights disabled: Does anyone have run into the same issue? I guess the solution is to put the hands into the shader code? Thanks a lot guys for your feedback ! Aless

I have some suggestions for ObjectWater performance optimization. Actually, even highly-optimized Oil Rush game should greatly benefit of those changes cause users would appreciate FPS increase in naval scenes. 1. When water is not visible - hide it It sounds weird but that is a fact: water object in scene eats 10-15% FPS regardless of visibility and occlusion queries. Disabling dynamic reflection can be used instead of hiding whole object - it have the same performance impact. In our project we use simple 2d height map and some kind of checks for view frustum intersection with zero-level zones and reflection is disabled if there are no such intersections. Even this clumsy implementation gives great result - 70 FPS instead of 60 on islands and continents that is ~16% increase. Conclusion: improved visibility queries are needed for water-less locations. 2. Improve LOD usage for reflection (distance checks for reflected objects, skip terrain detail maps, etc.) I made a lot of tests and it seems like reflection uses lower (closer) LODs than regular view. I.e. in lake scene (screens below) disabling reflection for tree branches and clutter objects improved FPS by 10% and decreased overall polycount by 100k (!!) with no picture changes. After spending a day tweaking all models I finally was able to choose which LODs are reflectable and which are not, achieving significant FPS boost. Profiler screenshots are attached. Here we have improvement from 42 to 50 fps that means about 20% with no visual changes and with 216k polygon improvement. Also terrain reflection is rendered using material textures while it can just use coarse diffuse maps with exactly the same result. Conclusion: water reflection can be tweaked to skip clutter/distant objects and terrain detail maps. 3. Implement simplified pseudo-dynamic reflection Dynamic water reflections are great but if user's hardware is relatively weak we have almost no fallback - static reflections looked ugly for me until I found that we can grab an environment cube map from current location and assign it to reflection texture slot. It is not as precise and should be re-calculated with camera position change but it is much cheaper. In above sample static reflection is not 100% realistic but it 'reflects' all objects on the coast and gives 21% FPS boost. Unfortunately, grabbing environment 3d maps is really slow so we can't use that system in production, but I'm pretty sure it is possible to use some kind of data from previous frame buffer for simple 2d reflection map. Conclusion: cheap 'mirror' reflection would greatly increase performance on low-end hardware. -- WBR, Alexei