Question by WanHrust · Jun 24, 2017 at 11:37 PM · shader texture opengl

Texture3D does not work after alt+tab

I work with volume rendering and use Texture3D as my volume data storage. I upload volume data at the start:

 m_VolumeTex = new Texture3D(m_Width, m_Height, m_Depth, TextureFormat.RGBAFloat, false);
 m_VolumeTex.wrapMode = TextureWrapMode.Clamp;
 m_VolumeTex.filterMode = FilterMode.Bilinear;
 
 LoadVolumeFromUnity(m_VolumeTex.GetNativeTexturePtr(), s, loadFile, m_Width, m_Height, m_Depth, debug);

LoadVolumeFromUnity is a C++/OpenGL plugin which essentially preforms:

 glBindTexture(GL_TEXTURE_3D, texVolume);
 glTextureSubImage3D(texVolume, 0, 0,0,0,width,height,depth,GL_RGBA, GL_FLOAT, data.data());

Application works as intended at the start. However when I alt+tab from the edit and come back, application runs but my RayCast shader seems not to be able to sample Texture anymore. I have tried to call VolumeLoad function from OnApplicationFocus() however this did not solve the problem...

Any idea why this can occur and what could I try to fix the issue?

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