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Hi everybody The Math matrix function frustum() returns a mat4 variable, which I use for a asymmetric viewing frustum. I started with setting the params in meters but this didn't gave me the wished result. As I understand the returned mat4 contains integer values. Wouldn't be floats better? With a bit of try-and-error I found some params which results in a acceptable result. See the attached pictures. But I can't figure out how the params resolve the viewed image. The best result I get with overwriting the returned mat4 value .m11 with a float value... dmat4 frstmM = frustum(-0.035f, 0.0875f, -0.034453f, 0.034453f, 0.1f, 40000.0f); frstmM.m11 = 1.72f; player.setProjection(frstmM); Can somebody give me a hint? Thanks